though i´m a 5d mark3 owner, i absolutely agree with you. for the most paid things the 5d mark raw is not a solution. even if the hack gets stable. the data rates alone make it impossible to use for documentary shooting for example. i´m really happy that this hack exists and i can play around with it but let´s see if it becomes a good way to work. i doubt it.
i also think you all should not blame canon so much. it´s a normal strategy for companies to offer different product for different prices and costumers. for example i know somebody how works for bmw in the development. the 316, the 318 and the 320i have the same engine, they just crippled the lower end engines and sell them cheaper. it´s more efficient to produce a higher number of engines and make them less strong for lower end cars, the to produce 3 different engines. all bmw would be much more expensive if they would produce 3 different engines. even if canon would would use the same sensor in the 600d and the mk3, i would still buy the mark3, because i want a magnesium body and not a plastic camera.
for example the canon ef 50mm 1,4 and the ef 50mm 1,2 are both very good lenses. but the 50mm 1,2 has a much better build quality and a bit better image and it costs 5 times the price. but if you work every day with this lens and earn money with it, then you maybe wanna buy it. i don´t start thinking is this really 5 times better then the 50 1,4? or is canon a greedy bitch because of this? i just think about if the things, this pro lens offers, is worth the more money for me personally. it´s easy like that.
i mean who would think the 5d mark raw is the right tool for one when he works every day with it? and i don´t mean making test shots and playing around. this is important to do and i´m really thankful that it´s been done, but if i can get a nearly the same image quality then the mark raw with a proress codec, and a good handling of the camera and the post workflow. this doesn´t sound too bad for me.
it´s really funny that everybody buys canon and complains about them at the same time... lol