I decided to try load balancing around 20 megahashes equally between middlecoin, clevermining, and wafflepool about ten days ago. It's hard to compare them fairly since middlecoin pays out late at night, wafflepool pays out early in the morning, and clevermining sends little payments all day long. If I look at what has been paid to my wallet as of right now, Middlecoin is still paying better for me. If I completely drop Middlecoin's earnings for the first day to account for Middlecoin's previous unexchanged, as of right now, Middlecoin is still number one for me even though Wafflepool has paid out this morning and Middlecoin will be sending more tonight. If I look only at what has been sent to my wallet as of right now, and go back seven days, then Clevermining is in the lead, followed by Wafflepool, and Middlecoin.
All three pools are very close on earnings for me. Just looking at payments for the last seven days, when Middlecoin pays out tonight it will go back to being number one for me. Clevermining will send some little payments and jump around in my stats, and when Wafflepool pays out tomorrow morning it will probably go back to the top. Without playing with the numbers or increasing my sample size I can't really say for sure that any one pool is an order of magnitude better than the others. heh..
Chad