Better With Synchro-Rev Off?

Skyscraper

I think it has more to do with the output shaft of the tranny engaging the flywheel (via the trans shafts and clutch once it's engaged after a downshift) and forcing the engine to rotate faster to match the speed appropriate with the vehicle (or rather, increasing RPM and decreasing vehicle speed until they meet in equilibrium). Since the SRM has already increased the engine speed to the right spot electronically the output shaft does feel the resistance of the engine from the increasing RPM and therefore the vehicle does not slow down any faster than if it had been in neutral the whole time.

Hope that makes sense, almost confused myself a bit there.