Check out a few online reviews for data CD-Rs; I assume that the quality of data CDs a particular writer will produce is closely correlated with the quality of audio CDs (this assumption may be wrong). Some actually perform _better_ at higher write speeds than they do at lower speeds. But, in general, lower write speeds are better. For many CD burners, you can find their performance with different media at different speeds. For example, check out some of the reviews at cdfreaks.com.
Auda ibn Jad
Auda ibn Jad