That's fine. But making it sound like there is some huge different in earnings is dishonest. It is a *1%* effective difference between Bitminter and BTC Guild, and less variance to boot. Orphaned blocks *do* eat about 1% of your earnings (AKA: Hidden 1% "fee"), and on BTC Guild they are paid.
And while pure BTC earnings are unaffected in long term by variance (within certain limits), USD earnings *can* be impacted. More consistent earnings means you're more readily able to execute market positions with a steady supply of coins rather than being left dry during short term spikes.
I have gone back and edited my original post. I certainly didn't mean to be dishonest, I just forgot about the orphans.