I wonder if the sedan is that much different? Wind noise is very low on my tester and I cannot hear the CVT at all.
See below for plausible explanation Wing
From Mach2billy "I took an Impreza sedan for a test drive a couple of weeks ago and thought it was pretty decent, except for one big problem - noise. The CVT lets out a whine constantly which of course gets worse when you're accelerating. Add that to the considerable wind noise that occurred at 100 kph on a calm day, and
I figured I would have to be deaf in order to live with that car - or else it would need one of those electronic noise cancelling systems in the cabin."
Mystery solved