No fast song version of City Escape in Sonic Generations?

Ok this is my first blog and i noticed something in the City Escape videos from Sonic Generations.

thumb|right|400px|Skip to 3:34

thumb|left|400px|Skip to 2:08You notice it? The song don't go faster like in Sonic Adventure 2. Many of you may say it doesn't matter, but thing is that is not so exciting when run with the same song.