[JimD]

The engagement point of the clutch has absolutely nothing to do with whether the AC is on. There is a hydraulic cylinder that is directly moved by your foot that pushes fluid through a line to a slave cylinder attached to the clutch. The car's computer is not involved in the activation of the clutch so there is no way for the clutch to change when the AC is on.

I am not trying to say it doesn't feel different but I think the only thing that is changing is the available power from the engine.

Jim