Burnt CD-R less reliable than assumed (follow up)

Comin' back to the news concerning the article from PC Active and namely the lifespan of date on burnt CD-R, it appears thru variuous tests that were done, many brands will not allow them to last.
PC-Active test method is a simple one: CD from thirty different brands (more or less well known) burnt and tested in 2001, were then sheltered in their original cases in a closed place. This CD-R were then analyzed to the level of a bit, and it appears many CDs had become unreadable... in no more than a two year lapse !
While CD-R makers are prompt fo declare they give us bunches made to last from ten to a hundred years (some even boasting they'd last 50 to 200 years !!!), we're far from what had been announced.
But, that I must say to all CD-R users, they won't all destroy your data in such a short time.
Their lifespan seems to depend on many different causes:
- the media (the CD-R substratum and engineering process itself),
- burning operation quality (which depends on both the burner and the speed used).
To ensure the longest possible life to your CD-R, you should :
- use a media, burner, burning speed triad adapted to your data importance. Which means a stress on quality and ottpimized use of their capacities .
- Cautious keeeping and handling.