Looks like my experience with other CD-R and DVD-media.
I don´t bought any bad CD-R-media the last ~12 years, CMC, MBI, Prodisc, Mitsubishi, TY, Ritek, all worked nice for me. In the beginning at year 2000 many worse CD-Rs were available.
But actually I use CD-R very rarely, still have some old TY from Fujifilm and Plxtor
DVD-media getting more worse the last years, no matter what you buy. Only the actual media from Optodisc seems to be good, maybe some batches of Verbatim, too. But especially MBI, FTI seems to produce much lower quality than some years ago.