well i'm not an expert, but logically the burning speed just depends on how well your CD burner is.
back when CD burners were a new thing, I used to go through ~10 CDs just to burn a good copy! the rest would fail.
now with my CD/DVD burner, every CD i burn works!
but hes probably using crapy CDs and a crapy burner. So try burning at 1x
__________________
PC Specs: AMD X2 4400+ @ 2.921 Ghz, 1.47 vCore | G92 8800 GTS 512mb @ 740/1944| 4GB Dual Channel OCZ Memory @ 835 Mhz (5-4-4-15-2T) | 700 Watt PSU | DVD-RW Drive | 500 GB Hitachi SATA II Hard Drive, 30 GB & 40 GB Western Digital IDE Hard Drives | 1920x1080 40" LCD Flat Pannel HDTV monitor |
Consoles: 1 PS3 (60 GB), 2 PS2s, 1 PS, 3 GBAs, 1 GB, and 1 old school NES
Having troubles with PCSX2? Check out my guide to get it running correctly.
Running PCSX2 Guide for Noobs