Then either my PRINCO DVD-Rs or my 3520A are an exception to that generalised statement.
I have PRINCO disks (DVD-R & CD-R) that have been written over a year ago and my 3520A has no problem reading them.
These are proper PRINCO 'A' grade, (with batch number, printed top, etc), not the rebadged bulk crap.
However, I believe that the current, (as of about 6-8 months ago), PRINCO stuff, (including the rebadged stuff), is just 'B' grade being passed off as 'A' grade - a common occurance here in Oz - they never seem to have printed tops or batch numbers now.
BTW, the above DVD-Rs were written using my old LG GSA-4040B