Slush is down to 5%. No PPS is hurting it in my opinion. I tried both on BTC Guild and PPS is much more lucrative than PPLNS (I know Slush is different with SCORE). No wonder BTC Guild has started defaulting new workers to PPLNS.
BTC Guild's current PPS rate: 0.0000026464471419
My current PPS rate on slush's pool (avg. from the last 30 blocks): 0.0000026582937162
Even with the problems due to OVH being full of idiots and a 24h pool luck of 67%, I'm still making more here than I would have on BTC Guild...
Unfortunately, you can't consider Slush as being PPS as the payout is based on luck. But I was only making an observation in general between PPS and PPLNS systems from a pool that is consistent on the difference in payout bewteen the 2 methods. I was averaging around 0.06 BTC/day with PPLNS and almost 0.1 with PPS!
Not tying to dis-credit Slush in anyway.