I've owned an 2006 FX35 and 2008 535i both with HID's. Comparing my 2010 Outback HID upgrade with my other cars, I must say that it is matched closely with my other cars. The 2010 has the same excellent cut off line and the light source doesn't bounce everywhere. The light is evenly dispersed.
I have also tried HID's on my previous car, a 2002 Subaru WRX. That HID experiment ended quickly. I removed the bulbs off the car right away since the light source was not even and for sure would have blinded on coming traffic. I was flickered with high beams many times on the test run.
The 2010 outback lights are designed differently in my opinion. Even with stock halogen bulbs there is a cut off line on the light - unlike most halogen lamps. Just my two cents...