I believe price was the determining factor for the lack of success for DL dvds. Plus many normal consumers didn't know about the problems inherent with most DL disks that were available to them...at least not until they found they wouldn't burn, or lost data. Then you have the problems with the layer break on burning dvd-video, which many burning programs didn't handle very well. Imgburn for the win here!
Lite-on still has its proponents. I was never a fan, but even some very knowledgeable members here, like CodeKing, are Lite-on backers. (and if you think I'm going to argue with him on the subject you're out of your mind. I'd rather join the Polish cavalry and charge the German panzer columns)
The Lite-on's that use the NEC chipset should be fine for burning DL media. But aren't what we traditionally think of as Lite-on drives.