Could you show us the scans of this lost data from Verbatim media.
As I said I have never seen a POF from any of my media, and even though I have been a Verbatim user for many years (my floppys were Verbatim media and still working fine), I had got the odd duff brand a few times, but most still work ok. I have been going thru some older media from 2000~2002 the Verb and TY media are as good as the day burnt, only with a higher number of PI errors, which I expect because of use.
...and I had thought that you meant unburnt media over two years old had a greater chance of going bad, but you seen to think that 2 year old burnt Verb media has a 1 in 2 chance of not working, well I have landed heads in over 12,000 burns, and I think DrageMester said it best, you dont have verbatim media, or you keep your media in the street.
That link says its better to use tape as it last longer, it has no cites and TBH is BS, and says....
"If you want to avoid having to burn new CDs every few years, use magnetic tapes to store all your pictures, videos and songs for a lifetime."