The launch control on these newer Audis are INSANE! Easy (you don't have to be doing so many things in the right order - just turn off stability control and brake+gas) and very harsh (in a good way).
'13 C63 (LSD, DA, LP) - 421whp (91oct tune only)
'09 E92 DCT M3 (GIAC tuned) - Sold
'13 S4 (GIAC tuned)
'12 E70 X5 35d (Wife's)
'12 E90 335i (Sold) - '10 E92 335i - GIAC Tuned (Sold) - etc...