It really does. If you can get pretty much the same PI/PIF results on a 16X scan that you do on a 4X scan, that disc's readability errors are pretty much stable at whatever speed you choose. I wouldn't rely upon 16X scans solely. I always perform a 4X scan first.
@OP: I don't have any problems scanning T02 @16X. Attached are some scans. In order: 16X T02, 4X T02, 16X MAXELL 002, 4X MAXELL 002. The PI on the T02 16X scan gets really high toward the end, but the PIF stays cool. The MAXELL 002 scans are pretty much the same.
edit: yeah, i used Kprobe and CD-DVD speed; don't whine.