well, there are 2 things i could think of that.... might happen.
1. because you're trying to send data to the cd faster than it can write to it, it will probably turn the CD into a coaster about..... 99.985% of the time. or...
2. Could end up happening like the reason they say CD-RW drives can't really get much faster than they are now. which is the fact that the CD may not be meant for that kind of speed, could crack, and damage the CD-RW drive very badly.
highly doubt that #2 would happen, since the write speed is only the speed that the Drive/CD can Send/accept data, but #1 will most likely happen FAR too often.
P.S. the percentage for #1 is probably a major overexaggeration, but is still not worth all the coasters you'd probably get.