Why would anyone burn cdr 48x certed at 40x, if they have say a 52x writer, i burn my cdr at 52x and the media is rated to 52x i also threw out all my slower cdrw and high speed cdrw and got new ultra speed media thats 32x.
I for one will always burn at max speed and if someone invented a 20x dvd writer i would buy it, im little pissed to read that the msi and nec (as of diff writing strat) shave more than 1 min of the 16x burn time of 6m 02 for the pioneer 108, i was reading it here in reviews on this site, 5mins would be nice.
The old myth is dead about burning slower as nowdays with modern media and modern writers, the less time you take to burn the less heat damage / distortion there is to media, the drives and media are rated to do this, its not for fun, only time you need go slower and some will auto slow it for you is in overburning, thats not to say you must slow it but more change of failure of you dont.
I still stand by buying half decent media, it dont need be the costlyest in world, ive had no issue on my teac 16x52x32x52 dvd/cdrw combo or pioneer 108 with any media at max speeds, ive burnt all but dvd +dl as there like Â£5 each, used to be Â£10.
P.S the pionner makes dvds into booktype dvd-rom to get compatablility with older stand alone players, so bit setting aint that important.