A 250 cadet in Europe is far a different pilot from that of a 250 hour pilot in the States.
This is key. Comparing the Florida pilot puppy mills to the European cadet programs is like comparing a Richard Simmons exercise video to Marine Corps boot camp.
But at the end of the day... it's the guy in the left seat that will set the tone how the flight will be conducted.
This is another major difference between the situation with the United States based regionals and the European model. Too often in the States, in fact routinely in some operations, the guy in the left seat is himself a product of a pilot puppy mill and has minimal experience. So it is not so much the low time FO, but the culture that comes from pairing low time FOs with what are, by any standards, very green Captains who have never had seasoned role models. And add to the culture stew weak airline management.