MCC 03RG20 Verbs are my best discs at this time, actually better than TYG03.
The only problem that I have with these 16X -R Verbs is on my Pioneer 109, and this is a drive/firmware issue with CAV medias (all CAV medias are affected with the 109) that is discussed in the Pioneer forum. The media itself is not the problem.
On my Benq 1620 this media burns flawlessly everytime (though actually results are better on the Pioneer.. )
You probably have a bad batch, or damaged medias. Look for visible defects (spots) on the blank discs left. If you find some, it's a storage problem (heat). Try to bring them back.