my friend recently bought a pack of sony cdrs with the same atip info. i tried burning one at its smart-burn limit (40x) and even that was too high of a speed for these 48x-rated cds. i scanned it with cd doctor at max speed (40x in this case cuz it's an svcd), and even though the C1 count wasn't bad (max 27, avg 1.545) there were C2 errors (max 46, avg 0.064) at the very end of the cd, during the last minute or so. i can imagine that scanning at 52x would produce a larger magnitude of errors.
i tried burning another one at 32x and scanned again at 40x, and this time there were no C2 errors. these seem to be ok if burned at 32x or less, but i wouldn't try any speed higher than that, which is fairly disappointing since my friend got these for the same price after rebate as the fujis last week from best buy, which are good up to 52x.