Do code reviews frustrate developers?

You NEED THEM!

They are like your greens. They are good for you. They should be painless an routine.

Do not debate best practices in real time. Note issues, build a case or documented examples OFFLINE, and point out or answer questions in real time.

Be productive by example!

I've found that on some teams they can turn from a valuable way to learn into a "that's not how I would have done it" contest

Did anybody see any answer? He only cites some studies, but no proper answers