I think they deliberately toned down the "jumping" in this movie, to avoid that "weightless bouncy ball look."
the jumping in the 03 film was one of the things that my Dad DID NOT like in the first film. Now, I would say my Dad represents the typical casual moviegoer. He's familiar with most of the superheroes, but he doesn't "know" them the way we fan-boys/girls do. So, he was not aware that the Hulk leaped great distances in the comics.
When he saw the first one, that was the one part that he really didn't like. He thought it looked silly and stupid. He liked TIH MUCH BETTER than the 03 hulk, and was glad the new Hulk didn't jump around like that.
However, I think it's safe to say that the movie IMPLIED the Hulk could jump great distances ( after all, how the heck did he get from Brazil to Guatemala )....it just didn't show it on screen.