Not sure if you saw the ahashpool email response to that FUD....saying it's payouts to their own rigs.
Anyway, I really like ahashpool but have been meaning to try zergpool, currently using sniffdog. I tried mining to zerg but for some reason my data wasn't showing up on their site so I went back to ahashpool. Please do more testing and comparisons, doesn't sound like you did fair comparison because you said your ahashpool results are from Jan and coins went down a lot. Let us know if zerg really is more profitable. Thanks
Their response is a bullshit. Just imagine how much coding should they do to support such "private miners" while we see they have very basic yiimp installation.