Buyers make trust assessments in the first minute of a call. Before you’ve presented credentials, before you’ve asked a discovery question, before you’ve said anything about your work, they’ve already begun to decide whether they like you. The fastest lever for that assessment isn’t your portfolio. It’s a genuine moment of shared identity.
The Similarity-Liking Effect
Carnegie documented what neuroscience would later explain: we trust and favor people who are like us. Shared geography, shared experiences, shared institutions, shared values, each of these creates a social signal that reads as “same tribe.” The amygdala responds to this signal by lowering threat assessment, which opens the buyer to the conversation that follows.
This is not manipulation. It’s working with a real feature of human social cognition. Every competent professional who’s ever had a natural conversation on a sales call has benefited from this effect. The drill makes it intentional and reliable rather than accidental.
The effect doesn’t require deep similarity. Research by Robert Cialdini and others shows that even trivial shared characteristics, a birthday, a state of origin, a minor preference, produce measurable increases in compliance and trust. Genuine commonality works better, but the threshold is lower than most people expect.
The Five-Minute LinkedIn Scan Protocol
Run this before every discovery call. Five categories, one minute each.
Current company and role: understand their scope of responsibility, their likely pressures, and the language they use to describe their work.
Previous employers: look for any company you have direct experience with, or any that signals an industry background shared with you or your other clients.
Education: alma mater, graduation year (generates age context), and field of study. Shared schools produce strong rapport. Adjacent fields often produce professional common ground.
Current city: geography is an easy opener and often connects to professional network overlap. “I have several clients in [city], I’ve always found the [sector] community there to be…” is authentic if it’s true.
Recent posts and activity: this is the highest-yield category. What someone posts reveals their current thinking, their values, and their real interests. A post about a book, a public policy question, or a professional problem tells you far more about current mental state than a job title does.
The LinkedIn scan isn’t research for its own sake. It’s ammunition for one genuine moment at the start of the call. You’re looking for the single strongest point of resonance, not a list of things to mention, which sounds like homework.
The 60-Second Delivery
The technique fails when it’s applied with too much visible effort. “I noticed on your LinkedIn that you went to Penn State and I also went to Penn State and I also noticed that you worked at McKinsey…”, this reads as a compliance tactic, not a genuine connection.
The right delivery is casual and singular. One thing. Mentioned as an aside before the business starts. “I saw you’re in Denver, I spent two years working out of Boulder, I always liked that market.” Full stop. Brief reply. Move on.
The transition matters: “Anyway, great to finally connect. Let me start with my understanding of what you’re working on.” The transition signals that you mentioned the commonality because it’s genuinely interesting, not because you’re running a rapport script.
Real-Time Common Ground Construction
When no prepared point exists, build it from their first substantive statement. Discovery questions naturally surface shared professional experience: “I’ve worked with teams in exactly that position” or “I ran into a version of that problem with a client last quarter, the thing that usually drives it is…”
This is professional common ground, shared experience of a problem type rather than shared personal background. It activates a slightly different form of the same trust signal: “this person understands my situation” rather than “this person is like me.” Both produce receptivity. Choose the one that’s genuine.
The Referral Supplement
If the call was booked via a referral, a one-question text to the referrer before the call yields high-quality pre-call intelligence: “Quick one before my call with [name] tomorrow, anything useful I should know about them?” Referrers almost always have relevant information they haven’t thought to share: personality type, current stressor, what they value in a vendor, what frustrates them. This is the highest-fidelity source of common ground material because it comes from someone who knows them.
What Genuine Looks Like
The word “genuine” appears throughout this framework because the failure mode is inauthentic performance. Buyers who’ve been in more than a few sales calls have seen the forced common ground attempt. It produces the opposite of the intended effect, an impression that you’re working through a script rather than actually interested in them as a person.
The standard: only use a common ground point you would have found interesting even if it weren’t useful. If you actually don’t care about the college they attended, don’t mention it. The micro-expressions and tone that accompany authentic interest are absent when you’re performing it, and buyers read both. Real curiosity is its own rapport-building force.
