If big centers had such a high washout rate for OTSers, then why would they pick up OTSers to begin with? The answer is they wouldn't. There are plenty of ppl around here (some that currently work at centers) that say centers are BETTER equiped to handle developmentals because of the number of CPCs they employ and the ability to dedicate people to training, if you would like, I will go hunt for those posts and link them, but right now I have other things to do.
Stop telling people how they are going to wash out, if you were so good you would have been picked up for 5/6.
...because they need controllers at centers and experienced FAA controllers aren't bidding to centers because they have no incentive to bid up from other facilities. So for every 10 developmentals that come through a center, if 2-5 can check out, fantastic! Bring in 50 developmentals and hope that maybe 15-20 of them FPL...