The whole European 250 hr cadet is often brought up. Seldom, however, is the incredible mitigating factor: European theoretical training. Before any of these FOs set foot in an airliner, they've completed 14 different exams to get their frozen ATP. I've looked into completing it myself....but was put off by the price tag, as well as the 6 months of full time studying (yes....full time!), required to even acquire the knowledge required to even attempt those 14 exams. While theory alone does not make a good pilot, it at least gives them a leg up over the 250hr newhire here in the U.S with neither experience nor any theoretical background.
Let's compare that to the FAA standard....how many here even took any ground school school course prior to completing the one and only required ATP written exam? How many took the quickie memorize-the-narrowed-down-question-bank day course at ATP and the likes (like myself) and figured "aah, I'll really learn all that theory sometime later!". Anything I've learnt concerning turbine aircraft theory and such has been piecemeal and self taught after getting hired by my first airline over the years. I was absolutely clueless my first day of training at a regional...and this was after having read The Turbine Pilot's Manual back to front several times.
We're severely lacking in theoretical training here. It's mainly expected to be taught in systems at the first airline gig....but more often then not gets quickly glossed over while the ground school instructor tries to fire hose the newhires with the particulars of one aircraft. Until we can fix this issue, we need to expect a higher level of experience from airline new hires than that required for a fresh Commercial.