On a related note, I've had real bad luck with Office Depot branded CD's. They show up under Nero as "unknown". After a fairly short time, (maybe a year), the entire data coating will flake off. You can hold the data medium in one hand and a clear plastic disc in the other. Amazing.
I've used Office Max branded Moser Baer DVD+R that consistantly give quality scores of 98 in CDSpeed. Also, i picked up some Office Depot (Ritek D01) DVD+R Dual Layer that is giving QS scores of 95. I've also got decent quality CDR's for Office Max and Staples. Store branded media is not always bad, you just have to know what to look for.