As if to verify what I was just thinking, Sonic hits this small raised platform and stops. Now, in games like Sonic & The Secret Rings, this was a major downer, as you'd lose the rhythm of the game, have to back up and then run forwards again and make the jump. Well, it seems here Sonic will run up even vertical walls if he's going fast enough.
In this instance, he gets that new 'ghost' echo behind him for the small vertical movement, then he's back powering along and into the arms of the speed-up pad to make him go even faster. It's such a basic facet of the character, we're amazed this hasn't been done before.