I just received Prodisc 4x dvd-r from dvd-rwmedia.com. I ran nero cd-dvd speed test. The outcome--they are from VERBATIM CODE: MCC 01 RG20. The capacity is 4.38 gb, not 4.7. Average speed 2-2x. It started at 2.05x ende at 2.23x speed. type p-cav. another test on another dvd-r, started at 2.29x and ended at 2.46, average 2.39x, type p-cav. Can anyone explain this to me? Are they still good? I will try one out today to see the quality of the dvd.