Well I just e-mailed Memorex's support saying how disappointed I am in their media, maybe they'll give me something in replacement. Also the CompUSA RW media says it is made by Princo. I guess they are junk too. But 10$ for a 50 spindle 2 years ago was too good to pass up. The CMC Magnetics media was the CDR bulk (shiny, no label) media I bought from Fry's for very cheap at least a year ago or more and it continues to burn perfect discs at all speeds (even at speeds which did not exist when I bought them!).
I looked up the part number and UPC from the memorex 10x box on the internet
Part Number : 3202 3415
UPC: 0 34707 03415 0
And sometimes it shows as 12x media with the same part no. , so maybe they improved it. We'll se what happens and I'll post if they are helpful. I'll specifically buy Verbatim next time I go shopping.