Recording Speeds for Music CD's

Hope everyone is well and the summer has been fun.

I am eating out yesterday and 4 guys are talking about recording blank CD's. It was one of the most fascinating conversation I have heard. They all had different opinions on the fastest speed you could record a blank CD on a computer both disc to disc and wav file to disc, with latest software. They used Nero/Easy CD Creator and one other company that slips my mind as the software, computer being anywhere from 2004 to present top of the line ish, the company that makes the Fuji's as the blanks, no other programs open when recording. Only music being the end result, no data,video,etc.
With that info in mind what is the fastest speed if you recorded disc to disc for your neighbor and wav file to disc for the neighbor that the CD would turn out fine on both without them knowing if you did it 1x speed 2x or? Thanks.

SM