I can confirm that there are NO mounting points on the 2012 sedan. I can also confirm from trying to mess around with it that there is no simple way to put a rack on the vehicle. No rain gutters or any good places where a hook can grab the roof.
I'm going to be pissed if this is the case and may even go so far as to trade the car in. Skiing and cycling is pretty integral part of my life.
Just got off the phone with Thule. They stated that in about 2 weeks, they will be releasing the kit for the 2012 Impreza 4 door with the "Naked Roof". Parts needed will be:
480 Foot Pack
LB50 Load Bars
Keep your fingers crossed that it actually works.