Yes I noticed it a while ago. Also if you put the rear wiper on depending on the front setting it alters the intermittent sweep, more regular if front wipers on constant, less frequent if front wipers on intermittent.
My other favourite is the good remote central locking (if you have it) and the 'theatre' dimming of the interior light. When you take the ignition key out it illuminates then slowly dims. Makes the car that bit special considering it's small size.
I noticed this funny trick on my Panda the other day, and wondered if it was broken. The windscreen wipers seem to be controlled by remote control from an underground bunker in Milano. The car certainly seems more intelligint than either me, or my last Toyota.