The difference between the RED cameras and your DSLR is that the RED camera is doing it at 24fps or higher with its ability to shoot 120fps. Your DSLR might be able to do 8-10fps in burst mode.
There is a huge difference between in video from a DSLR and a RED camera. DSLRs can take a 5K+ still image topping out at 8-10fps, yet only records HD video. DSLR video is a heavily compressed 8bit 4:2:0 H.264 video with ~50mbps data rate. RED cameras record 4K+ video in a RAW format that is only slightly compressed and can do this up to 120fps. Comparing a DSLR to a RED or other RAW format camera is not being fair.
There is a reason a DSLR is priced < $5000. They are great for what they are, but people are not being honest if they consider a DSLR at the same level as a RED or any other higher end digital video camera.
Of course there is (or atleast was) a difference between a RED and a DSLR, my question wasn't really about that, it was about the dof claim. Note that Canon 5D has been used in number of feature films, even The Avengers[1].
