[ehsankia]

Basically, code reviews also happen to find a lot of other non-bug stuff (probably nits and style issues).

That's why looking at % is dangerous. You could be finding 5 bugs per code review, which is a lot, but if you also make 30 other non-bug comments, suddenly "only 15% of comments are bugs".

[godelski]

Oh I completely agree. There are just a lot of things that can't so easily be measured and many things that can never be. But that doesn't mean they don't matter. Following the point you're making, enforcing good style can result in bugs not happening later on or even save a lot of future time as your code doesn't slowly spaghetti. And I think that's one where people often miss. That spaghetification happens generally through a slower process. By dozens of commits, not by a handful.