I'm going to float a theory here, meant as a possible reason why low-timers may get themselves in trouble. A pilot goes through his initial training, gets his private, jumps hardcore into his instrument, learning all the regs, how to do things, etc. He takes his instrument checkride, and his IFR flying skills are (hopefully) very sharp. Then he goes into his commercial, learns all the chandelles and lazy-8s (why we still do those I don't know). He gets his commercial, then CFI, then starts instructing. When he hits the magic number he applies to a regional. Meanwhile the entire time he's been getting his commercial/CFI then instructing he has flown little to no actual IFR. So now he's in training learning to fly an RJ while at the same time re-learning how to fly instruments.
I think this is a possible reason why captains have problems with low-timers. They don't have true instrument proficiency, and are trying to get it back when they're figuring out the jet. So if this theory holds water (not necessarily the case), then if a low-timer has flown a lot of IFR in somewhat complex airplanes, does that make him a more acceptable candidate in the eyes of you experienced captains?