There's probably a middle ground here. If you'd taken the time to make sure the patch actually compiled, ran and attempted the things it was advertised to do before releasing it, I suspect problems with it would've been obvious sooner.
That's quite possible. It's also quite possible that we still wouldn't have released it yet, as we'd be doing that work to make it generally usable this week. Therefore, the critical failure - that we weren't protecting the CRT values - might not have been known yet.
Sadly, the multiverse doesn't yet let me monitor its A/B tests.
