I would say the bikes weren't trying very hard. Probably afraid to really open up and drive crazy, it's different when you're on a bike, speed is much scarier. They were going like 150 mph at times. My old car could have easily hung in there at that speed as long as you have the balls to swerve traffic like that. I wouldn't have done it...well. Anymore.
EDIT: WOW the balls on those guys in the second video F that lol