Oh no, I know exactly what caused the gotta go fast bug, I stopped manually limiting the engine to 60fps on Windows and left synchronization to opengl. To quote the Street Fighter 3 announcer, yeah that makes sense.
I know it may seem like it's not really going anywhere (demo 2 and demo 3 are pretty comparable gameplay-wise), but at least on the technical side, everything is still getting more stable. Even when Sagat starts walking on air, or Ridley flies away to never be seen again.
Anyway, thanks for the feedback. I still haven't given up on a jank-free future yet. I WANT TO BELIEVE.