Bug... the old weapons curve was still in effect after they removed weapons, it made every defensive lineman play like he was an 83 or lower in the skill it's making use of (i.e. power move, finesse move, shed blocker). It was corrected after the demo was finalized.
The "Normal" game speed is halfway between the demo speed and Madden 09. I don't like this speed, didn't at CD either. Too sluggish. I hate '09 speed, makes the game about twitch, no reading, no setting up, no reading blockers. Normal is just right (it's also the most technically realistic, as players run their real 40 times in it).