Claim
Hiring rubrics that reward "no major weakness" produce 3/4 candidates across every dimension and a low ceiling. Hiring rubrics that reward peaks — 4s and 2s — produce candidates with real strengths and real weaknesses. HubSpot's hit rate improved when they switched from un-weakness to spiky.
Mechanism
Capability is bottlenecked by the highest spike, not by the average. A team built of well-rounded 3s rarely produces breakthrough work. A team built of complementary spikes — each member a 4 or 5 in their lane and a 2 in another — covers the full surface through pairing. The hiring conversation also gets sharper because the rubric forces the team to name what specific spike they need, rather than rejecting candidates for soft "concerns."
Conditions
Holds when:
- The team is structured to absorb individual weaknesses through complementary pairing.
- Onboarding can shore up the weak dimensions or work around them.
- Leadership has the temperament to manage strong, opinionated people.
Fails when:
- The role is solo and weaknesses cannot be covered.
- The team's culture cannot tolerate sharp edges.
- "Spiky" becomes a euphemism for difficult and the team mistakes incompatibility for excellence.
Evidence
"We used to hire candidates where everyone scored 3/4 — no major weakness. We switched to candidates with 4s and 2s — real strengths, real weaknesses. Hit rate improved."
Brian Halligan applied this at HubSpot across multiple hiring cycles before joining Sequoia as CEO coach.
— Brian Halligan on Lenny's Podcast, 2026-04-28
Signals
- Reference checks surface specific stories of brilliance and specific limits, rather than generic competence.
- Hires that pass the spiky bar become disproportionate contributors within a year.
- The team's capability surface widens because each hire adds a peak.
Counter-evidence
For roles where consistency is the value (compliance, finance ops, customer support), un-weakness wins. The spiky rubric is conditional on roles where peaks compound.
Cross-references
- Evaluate CEOs and senior operators on Lovable, Obsessed, Chip-on-shoulder, Knowledge, Student — the higher-level frame