That's definitely not true. I'm mining on the second p2p myself for weeks now, with about 750kH/s. It pays out regularly and quite as much as one would expect.
I am gonna try it, never done it, only read few discussions,
on p2p pool list is 2nd for 1.5-3Mhash, and here are less than 1M on 2nd , is there any benefit if I go to 3rd from 2nd ? ( I have 620 khash)
thanks