IMO, it sounds like they're trying to fine tune a Porsche-like sound into the engine/exhaust note. This would be the best one could possibly hope for but still not the S65.
"what I'm driving here...is an ending." Jeremy Clarkson
2011 Alpine White BMW M3 6mt ZCP Coupe
2008 Alpine White BMW 328i 6mt Coupe (retired 06/21/11)