Boris Badenov
Fortis Leader
135 practice certainly varies more than 121, but I and the vast majority of guys I've flown with switch legs or days unless the F/O is new or the day is extremely demanding (KASE to mins in storms, I'm probably going to fly unless I know the other guy very well). But if I read correctly, the F/O had something like 3500TT. Doesn't seem like a lack of experience is easy to point at, there. The question of standardization, etc seems much more likely to get to the heart of the problem, to me. But that is, of course, speculation.