Hi,
I've owned the vehicle for 3 years.
Whine appears to be present in heat mode - I set the thermistat to "HI" for both front and rear and presume this would disengage the compressors.
Did it whine from day 1 - hard to tell. I noticed some whine a while back but it seems to be worse now. At least it's bad enough to bother me now.
Pitch is constant - does not vary with throttle.