CDs exploading is a very serious phenomenon, one which I researched very carefully when I first started getting into the industry. I hadn't come across this article before, but the note at the bottom regarding the PSX CD that exploded in the 52x CD-ROM is worth looking at.
There have been several documented cases of CDs exploding when used in highspeed CD-ROM drives. Most of these cases happened to involve a 52x AOpen CD-ROM drive (at least the ones I read about did).... needless to say I promptly sold my 56x AOpen CD-ROM
The bottom line is that no CD should explode at 52x or 56x even, a properly working drive, and a properly balanced disc should be able to be read at those speeds without any danger.
Just my 2 cents
Punch Cards -> Paper Tape -> Tape Drive -> 8" Floppy Diskette -> 5 1/4" Floppy Diskette -> 3 1/2" "Flippy" Diskette -> CD-R -> DVD±R -> BD-R
The Progression of Computer Media