Yep, the gap was quite large which shows what AWD can do on the track. The RS5 actually posted very similar acceleration as the M3 in that test which isn't bad at all as the RS5 is heavier and shows that the RS5 V8 was making some extra power over the M3.
The C63 was the quickest by far (about the same as the S6) but it finished last in the test.