Impact of mat has differed depending on the table I have used. The Auditorium 23 is well deserving of the praise it gets on the Well Tempered Amadeus, but I found that the Origin Live mat didn't have a positive effect on my Townshend Rock 7. But the Rock is designed to not have a mat, because the "The platter is machined from high density polyethylene (HDPE) that was chosen for its virtually identical physical properties to the vinyl LP."
So as always YMMV.
Note: neither of these are carbon fiber, but thought this was an important point to make.
Another note: If anyone is interested in a good deal on an Origin Live mat, lemme know.