For me, it is seemingly the write process uses DMA bypassing the CPU, so any EOS should be able to do that RAW "Video" shooting regardless of the CPU speed, so long as the CF/SD card supports the writing speed. So I wish one day that I can see this raw video feature appear on 7D. Cannot use picture style is a disappointment but the stunning details and high DR making the pictures looking very real, so it is worth it to go that extra mile I guess.