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...