Difficulty is very high. It's hard to get a share in with 1.5TH/s. It took me 12 hours to get one share with 1.1 TH/s.
Remember the 3 days PPLNS. Your payout dropped because some of your shares from 3+ days ago have fallen off.
M
in other words at this time isn't profittable mining in p2p with <1.5 TH / s?
E
No, I don't think that's the case. I think variance will get you if you're under 1 TH/s ... and after the 20% diff increase coming up, the threshold for hashspeed will likely raise.
That said, I see a few folks with S1 (180 GH/s) on my p2pool node, so I guess it depends on your tolerance for variance.
M