the thing is
do you want to burn every cd at 2x???
(this is just mathamatical not practicle)
if it takes 30 minutes to burn at 2x
it'll take 15 minutes to burn at 4x saving you 15 minutes
it'll take about 8 minutes to burn at 4x saving you about 22 minutes over the 2x burn
i guess what im saying is that if you got a fast burner, why settle burning at a fraction of the top speed?