Where it occurs, it tends to involve a full time properly structured, managed and mentored training programme,
That was in the old days pre JAR now there is no difference between the two products, in fact the intergrated product is getting rapidly worse, they need to get a huge grip of there standards and not just teach to fly multicrew jets.
The best seem to come from certain small schools.
Tayflight up in Scotland
Bristol
One of the schools in Bournmouth
And of course Exeter I might add that Exeter seems to always produce a known quality product.
I have flown with 4 low houred FO's taken on in the last 6 months it would have been 5 but one didn't make it through type rating, he was intergrated and it was basic flying skills let him down.