I believe both of you, but our process did/does nothing to overtly catch cheaters, we hired directly off its conclusions, we hired at a rate faster than most VC-funded cash-flow-positive YC companies, including in SFBA, and we never let anyone go (nor did anyone ever quit while I was there) once we made an offer.

(Matasano is also not a company where it's easy to duck attention and coast; the tempo is 2-3 week engagements that wrap up with metrics that everyone cares deeply about).

The conclusion I draw is that cheating just isn't as big an issue as people think it is.