All Crop sensors have less MP than full frame. They do not like me saying file size has anything to do with the physical size of the sensor. Of course two sensors with equal pixel density, the larger produces a larger file. Were not supposed to relate these two in this discussion though. They want to be hard core sticklers and say file size is controlled only by the number of MP, which is somewhat correct except there are a few other factors involved.
As has been said above, All crop sensors do not have less MP than full frame sensors.
What do you want from this thread exactly?
There have been numerous discussions on numerous different aspects of files size in relation to sensor size, MP, compression algorithims, and whatnot...
It was pretty clear from the second or third post that no one knows exactly which aspect of the 1DX limits the FPS. There are many different areas of concern that are all near (80%ish) of their capabilities.
There are many different opinions on this but no hard facts, we've heard many opinions(many from good sources) so far, but obviously you haven't heard one that satisfies you.
What exactly are you looking to hear? that the file size and Digic V's are the limiting factor(to corroborate the story you remember)? i'm a little confused on what we are arguing about at this point besides your lack of satisfaction from the answers given.