Bitminter recently had a block of 99.33% CDF and then 99.25% CDF right after and then two blocks above 86% CDF right after that. There's a large difficulty change today too. Is this pool moving to a P2Pool back end right after this block?
Work is underway on doing a p2pool backend. Unfortunately it's a fair bit of work and is unlikely to be working for the next block. It doesn't matter though as once it's working I'll switch it mid-block if I can. It is what's consuming all my pool development time at the moment though.
I'm not sure why people would mine on a p2pool based pool when they could just run p2pool themselves but at least it wouldn't matter too much if people dropped out since the p2pool network as a whole would enable blocks to be found faster vs a lone pool.