I just picked up my first Subaru yesterday and got everything set up at the dealership (Bluetooth audio/phone/etc.)
I am now finding that if I keep my phone in my left jeans pocket that the Bluetooth signal becomes weak enough that it causes some minor skips/audio artifacts. However, if I pull it out and put it on the center console then everything works just fine.
This is surprising to me since I should technically easily be in range. The phone in question is a new iPhone 5, which has not had problems dealing with other bluetooth connections.
A search of the forum didn't come up with much, so I'm wondering if this is a known weakness in the WRX, or if there might be a problem with it's bluetooth antenna.