Originally Posted by JARblue

Any sports car with a little bit of power is going to require minor clutch slipping (which implies a little throttle input) at lower RPMs for a perfectly smooth shift.

The rev hang is totally appropriate at lower RPMs. If you'll pay attention, you'll notice SRM doesn't do it at higher RPMs. The RPMs drop quicker during a high RPM shift, so SRM doesn't hang as long, expecting a quicker shift because racecar. They drop slower at lower RPM shifts because the shift is generally slower and more deliberate for normal driving.