When I first read your message I though arrrghhhh - haven't you read I am a newbie and also, as it happens, I had tried a search (of course) but... I had searched under my model not knowing this is a more generic issue.
Anyway, thanks to you I read the article, didn't understand most of it, but did see enough to remember that when I installed the drive I didn't go into the BIOS as mentioned in the article. I just did this, turned the drive on, and now in hardware set-up it is now set to ultra DMA mode - previously it was on PIO even though I had selected DMA if available! This has made the MOST ENORMOUS difference. I simply cannot believe it. I can't even tell it is burning! the CPU usage is hardly visible on the graph and the burn time is less than halved. Meanwhile I am writing this article as the disc in burning. Thank you VERY much!
If you are kind enough can you explain one thing to me please. I notice in the link you provided the user has a primary and secondary IDE channel. In my set up their only seems to be one accessible in the device manager. I have a DVD burner and a separate CD burner/DVD read sharing one cable with the DVD as the slave and a hard drive on a separate cable. I think that may be relevant!?