Seems to work fine on my 2.5 (my car is no longer a 2.0L)...check out my dyno graph above. This was the first one of these turbos out of the gate for the Subies (they have been doing this for evos for a while). I will have the build thread up hopefully tonight or tomorrow...sorry it's taken so long.
The car makes a full bar of boost by 3400-3500 rpm and full boost at 3900-4000...on top of that, it made 426 HP at only 22 psi. We ran out of fuel. This turbo is designed to be run at 26-27 PSI, on E85 and Calvin (at Cobb Plano) said that it easily has 470-475 with a bigger injector.
You can doubt it all you want, but the proof is in the dyno graph.