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).
I don't know Acejam, but he runs a load balancing cluster of p2pool nodes here:
https://bitcointalk.org/index.php?topic=422242.0i have my own very stabile and effective node and don't need to look for other one. i just used for testing purposes other public nodes to have comparison to my own node also.
if i look this node than in the first moment it looks as they have to high dead rate and their efficiency is not at this moment very high neither. for my purposes some other nodes were better.