Azuardo said:
although at 2:15 he seemed to snap out of his jump to go into the loop :/
Automated loops most likely.

Sonic 4 was a massive insult and whilst this looks a million times better in both graphics, music and physics, it still doesn't quite seem to be on par with the classic physics.
I hope the 3DS version turns out well and is different enough from the console versions to warrant purchasing both.