Fostex, based on some of the folk currently on the FPP, I don't think having too much ppl experience is necessarily a drawback.
Most of those who were successful won't have hundreds of hours already in the bag, probably not because it's frowned upon but because the vast majority of applicants won't have already done hundreds of hours of flying. There are certainly folk in the programme with hours running into the hundreds, or even an instructor rating, just not the majority.
Still, who knows.