If you're not willing to accept variance then you have no business on a 500 MH pool. Just take a look at the pool hash rate and move on (until it gets bigger at least).
Wow, that's a bit arrogant. So are you going to start telling me how to live my life? Who are you trying to defend? I've said nothing but good things about waffle. Are you seriously white knighting a different pool in a thread about waffle?
EDIT:
Oh, and in a more specific response to variance on a 500MH pool...
...yeah. Really volatile there.