One of the reasons it would have looked slower in some videos:
The wiimote. Simply put, when noobs are playing smash bros, double tapping > to run isn't something they would do. All the characters would be at their maximum walking pace, but not running. This was the case with a good number of the videos.
Brawl is slower with respect to vertical speed mostly. Horizontal speed has been reduced, but the most evident slowing down is in how fast characters fall. Another way that brawl is 'slower', is that moves like samus' up+b, when hitting, take a lot longer to perform and finish. These kind of combo moves are more akin to ssb64 than in melee. Melee's multiple hit moves slowed down a bit while hitting, but nowhere near as much as ssb64's and brawl's.
While brawl has been slowed down on a few fronts, it doesn't mean that the gameplay overall is slower. When I heard it was slower, I thought more along the lines of slow-motion melee, and that had me worried. Then I saw videos, and characters were, in many respects, as fast as ever. With the new L-cancel system using fastfalls especially, I don't think that we are going to have any problem with the speed of this game. As everyone says, it's a different game, so judging how much it will kick *** by it's speed and comparing it to melee is completely useless and does a disservice to everyone working on the game.
I can pretty much guarantee you that the game will be perfectly paced. Everything is designed to work together. You can't just take brawl and make it 1.5x faster and think it will result in a more fun game, because it won't. It will be balanced and well thought out. Just you wait
