past 3d sonic titles were generally on rails and too fast. you didn't have the time to react and in the end it was just try and error the whole game.
sonic lost world seems to have adressed the previous 3d sonics issues. sonic has a low regular speed wich is better suited for platforming (sonic's genre) but also let's you acelerate him at will. you can explore the levels or rush through them. seriously, the game looks great.
and "not fast enough" was the most pathetic try to diminish a game that I've ever seen. especially when too much speed and lack of control is what hurt the other 3d titles. this excuse is in the same category as the reviewers who said zombiu (a non action game) didn't have enough action and that was a negative point.