Well as for the secret identity thing, no one on the train could say "That's Peter Parker", because no one knew him. But Harry wont tell, in the comics, even when the Goblin persona had taken over completely, he cared too deeply for his friend to rat him out.

Anyway, I loved the movie. I thought it was way better than the first. It was funny, dramatic, and really deep. The acting and the CG were great. Of course, it doesnt matter how good a movie is, there will always be someone to nitpick and complain about it.