Your problem is that YOU DON'T READ! I'm not just talking about Plextor I'm talking about ALL manufacturers of these Optical drives. And if you've been purchasing and using any of them then you should be aware of what I'm saying! Most of these Optical drives DO NOT perform out of the box as they should, therefore, "Firmware"!
"The drive is doing what it clams in terms of speed, the problem is the write quality is poor, which may or may not be correctable via firmware." Thanks for PROVING my point!
Also, I'm not complaining I'm just stating a FACT! Tip
: I've owned nothing but Plextor drives, (And I might add they have given me "Great" customer service too!) so I don't have anything personally against Plextor!