The military has done it successfully for years....what makes you think an ab-into program couldnt be done successfully as well. Lufthansa and South African two name just a couple have used programs like this for many years.
Had guys in my UPT class that graduated and after transition training.. ie. 3-4 months of sim and aircraft flights.... were flying right seat on C-130's, KC-10's, KC-135's, B-52's, C-5's, C-141's..... etc..and most of those guys TOTAL flying time was probably in the 250 hour range. If the military can do it... why shouldnt an ab-into training program with very strict standards be able to do it as well?