Schemes won't always beat speed, but a lot of times speed is mental and coaching vs purely physical. Make a decision a split second too slow and you're physically in a hole and chasing. Practice, practice, practice; getting the reps to make it more automatic is that much more important if you don't have a pure physical edge.
GT/Miami in 2004 looked like the Jackets wouldn't be able to touch them for years - dramatically outgained in a blowout, couldn't get anything going, and even the day's biggest play for GT featured a runner dragged down short of the endzone after a 50+ yard run. But in 2005 and 2006 GT was toe-to-toe with them in total yards and executed well enough on both sides of the ball to beat them two years straight. Year over year team speed improvement, or just executing better so you don't have to be able to constantly chase them down?
Yeah, you'll still get be playing catchup against the team with the athleticism advantage *and* good execution, but practice, consistency, and honing those decisions will go a long way against the TAMUs or Miami's of the world who usually don't have those things down right despite the speed.