Yes, I heard of this, and seen 2 drives afterwards. at 52x the disk is spinning around 10k RPM, any crack or defect may cause the disk to disenagrate.
they actually breck due to plastic "creep" (wrong word, trying to think, but nothin' happens

) and it takes several minutes at high speed for it to occur.
saw a site a while back (looking for link) where they had done tests on most brands of disks to see when the fail.
most exploded around 22k rpm right away, but all failed at lower speeds after a short time.
Can't find it now, I will post it later if I can find it.