If you often use GigaRec, you may notice that Plextor drives will only read the GigaRec disc at max 8x (green line). Well now, our friend BenQ DW1655 will read the disc a lot faster (red line).
In the attachment below, the 104:05 mins GigaRec 1.3x disc was created with PX-712A. At this point, only DW1655 (and of course Plextor) can read the disc. None others of my drives can, including NEC 3540, LiteOn 1693, LG 4163, and BenQ 1620/1640.
Thanks to Jan70 from this thread.