the current 18MP sensor is terrible. Not event my best resolving lens produces sharp photos on my 7d, whether it is the AA filter or the sensor itself, Sony, pentax and Nikon have been killing Canon in this regard for years. How many years since they produced a new APS-C sensor, its been too long and they're losing customers because of it...or should be atleast(their brand name is what sells the cameras, not the cameras themselves for many rebel owners). I'm too invested in Canon gear to change and the 5d really was Canons saving grace for me, but seriously this coming has enough money to be upgrading low volume super teles and yet the cash cows have been englected, doesn't make much business sense to me, though niether does producing a lens almost two years after announcing it.