Thanks for reassuring.
@pdirestajr: very sharp pics.
Many dub 36-40Mp for "studio" use, what is overlooked in my opinion is the cropping ability. Shooting outdoors with an all-purpose 70-200/2.8 I find it necessary to crop to get the subject right particularly in freeze-frame action shots like airshows, flying birds, etc. (daylight, no more than 100-200ASA). Such I enjoy in 5D2. Starting to crop a 36Mp image (say 50%) I don't know if it would be a strain. For still shots indoors, or candid, guess it would be just fine.
Btw, Canon Lens Work III (the book, ed.2006) says for the EF line-up, particularly L-series, all have "ultra-high resolution", no precise limit. It does have the example of softness on p.135 with an enlarged part of a yacht mast.