As a CD burner rotates the disc at a higher rate, speed stability goes down and any wobble gets magnified. Both of these issues will cause the pits being burned to have sub-optimal shaping. In the best case, this will cause misreads that fall below the error correction threshold and just cause hash and glare. In the worst case, especially with older CD players, the disc will have so many errors it won't even play.
I've experienced this firsthand, and slowing down the burn speed always made things better.
I've experienced this firsthand, and slowing down the burn speed always made things better.