Don't think it is just being caused by e-net as I doubt verbatim would allow their discs to be overprinted unless their wasn't a demand for the discs, was a flaw in the surface print, or they weren't quite up to verbatim standards.
I tried out some moser baer 16x discs and was very impressed with them, even with MBI's own codes on the discs. Haven't tried out the prodisc ones though.
I tend to think it is just a worldwide supply and demand problem, and there is no way to fix the problem quickly. CMC is the biggest manufacturer at the moment and it is almost impossible to get discs from them quickly, and there isn't the normal smaller factories to pick up the slack because they are still producing 8x having not worked out the 16x technology.
I would say whoever has stock of 16x discs is going to be dancing a little jig of joy