What is the correct speed to burn a CD of Knoppix?

I have downloaded the ISO of Knoppix 3.3-2003-11-19, checked its MD5; that showed my download was complete and valid; then burned it at 16x in Nero5.5 in WinXp.
Trying the testcd command at boot comes up with everything being OK

I also have the copy of Knoppix 3.2 which was coverCD#2 on the october 2003 ed of Australian PCWorld.
This copy of Knoppix runs much faster in my CDrom drive than the copy of 3.3 I burned earlier today.


Jenifur Charne