I read a lot of criticism of that process as guys who were with one outfit who were wounded were sent to a new one on recovery and didn't fit in well.
History Channel had one guy who said the "Repple Depple" sent him a bunch of Sherman tank crews who were chosen because they were farm boys who could drive tractors. They fired three rounds at target practice and were sent into combat. He sent 19 tanks in counted 13 burning hulks along the road an hour later.
Another guy talked of a newbie who was riding on the back of a tank and when the crew panicked and jolt the tank, he was thrown off, run over and crushed by the retreating tank. Total time he was with the unit was something like 15 minutes.
Those vets I talked with said it was a lousy system.
That sentiment appears to have been universal.