Miners, you should really be looking at the blocks page to see how profitable a pool is and NOT the per day calculators.
The calcs in mpos are based on a fixed block size by default AND are only a guess based on your hash rate. If you are submitting bad shares or the pool is having bad luck and or orphans that will be way out (and usually is).
A better gauge of your daily income is the blocks page and look for the percentage area. 100% is the "expected" based on the coins difficulty. The lower the number the better. Ignore the 1hour/24 hour as they are subject to HUGE swings due to luck and variance. The 7day, 4week, and "all time" are a much more dependable way of judging the pools profitability and over all luck.
Happy mining,
Nut
Agreed we need to spread mining.