Same here. I burn and test before printing (IP4000).
None of my further scans of printed discs show any change in PIE/PIF figures, except for the couple of first burns last year, when I didn't pay much attention to the shallowness of the Pixma tray.
This whole thing is a non-issue when one is careful and doesn't turn the disc in the tray.
Now about the original question of the OP, yes most mediocre discs can be worse in their printable version. This has often been reported. With some questionable media, the difference between a successful (but mediocre) burn and a coaster can be very thin depending on your burner and burning habits... so throw in some balance issues from a badly manufactured printable layer, and here come the coasters.
Nothing of the sort with premium discs, though...! So as it has already been recommended above, use good discs and your problems will probably go away.