There is a little switch down behind the shifter. That sets the SMG performance level.
S1 - S5 normally, and S6 only if DSC is turned off.
The level is indcated by the bars in the display (like cell phone signal bars). There will be some number colored in, and some outlined. If all are fully colored you are in S5 or S6 (depending on DSC on or off). Both S5 and S6 shift at 80 ms when at full throttle.
If you have no idea about this, you are likely in S1 - S3, which will shift much slower.
'95 Alpine M3 LTW
'00 Dakar M Roadster
'02 Topaz M3
Red/White SRF #4 (Chassis 561)