I would have sworn that my EOS M was producing better RAW high ISO shots then my 7D, yet comparisons at DPReview and Imaging Resource do not confirm this. So it looks like there really isn't much change among the 18 MP sensors from Canon.
The EOS M does have similar ISO noise characteristics as the 7D (and the other 18 MP sensors), however, the EOS M does yield sharper images than the 7D, likely due to a weaker AA filter.
Surapon, those are beautiful photos - I think they're my favorite of the work you have posted. They certainly show off what the 5DII is capable of and are very impressive shots. I find shooting dancers very challenging but you make it look easy!
