Sorry, i did not try to sell you anything.

My reference miner mined ca 3% more in p2pool (not even in my own node). to give here proofs is to much extra work for me. i had in every pool 2 BFL 60 GH Singles mining and payouts were following between 15.january and 15 march:
Ghash.io - 1.012 BTC
Eligius - 0.997 BTC
P2pool - 1.027 BTC
btcguild - 0.962 BTC
of course this difference is not huge but in the end it makes some $. only advantage of big pools was that i did not have to check and restart my miners every week. in p2pool i had to check all the time how my miners were working, restart them or even change the node (there are not many stabile nodes out there - sad but truth).
Those are good numbers. But it doesn't prove much because luck in one month can vary quite a bit, and you didn't include NMC which is available from eligius (and btcguild).