There shouldn't be data loss at the higher burning speeds, but the copies may exhibit higher inherent jitter due to inferior definition of reflective boundaries. Depends on the blank quality and the burner.
cd burning speed
i've previously read here that to make the best sounding copy, you should burn at 1-2x only. although i definitely hear a difference between different blank cd-rs (cheapies don't sound as good), i don't hear a difference between copies burned at 1x or 16x. who's right? thanks for your response.