Correct me if I am wrong!

IMHO the bottleneck of the Canon EOS 60D is the built-in SD-card interface.
Several tests show that the maximum troughput is about 20 MB/s.
Even a resolution of 960x540 pixels, 25 FPS, RAW, 14 bits/color, needs 22,68 MB/s (or 21,6 MiB).
So shouldn't we aim at the maximum of 960 x 480 pixels, still needing 20,16 MB/s (or 19,2 MiB).
Note: these calculations do
not include audio!