I will say that one of the brightest points of my short time sitting in the right seat of the regional airlines is the high quality of most of the young Captains I have flown with. I work at one of those "quick upgrade" outfits, and I've flown with some fresh-out-of-training Captains who -- had they not told me it was their first trip off IOE -- I never would have known were so green. Now, these guys all had time at other 121 operations before coming over to this one, so it doesn't exactly fit what you're referring to here, but I think there is an important indicator even with "prior experienced" new Captains.
Now, I'm the first one to note that it really doesn't matter much how pilots perform when everything is going well, it matters how they perform when things go wrong. Although I haven't faced any emergencies with these new guys, I was surprised at their attitude, knowledge, and competence during the course of "solving the world's problems" via cockpit conversation over the course of the trips. The vast majority of them were mature, humble, knowledgeable, and most importantly excellent leaders of crews and mentors to junior crewmembers (e.g. me!). Unfortunately, I have no idea how they'd do when things are on fire and people are panicking...but having attempted to train people for that in my previous life, I can say that there's no training that can adequately prepare someone for the moment they think they are going to die...
What I most importantly haven't seen is what I expected to see: the "teenager with the keys to dad's muscle car". Ergo, regional pilots with all the authority and none of the maturity to use it appropriately. Yes, I have flown with a couple guys like that...but the vast, vast majority have not been like that. Stereotypes are stereotypes for a reason, and having observed the airline industry for years from the outside as a professional pilot, that's what I expected to find. I have been very happy to see that -- at my outfit, at least -- that stereotype isn't in the majority of guys I've flown with.
So, there is a culture currently that appears to be raising these guys right. I think it is a good indicator.