Im running in DS. The car on the concrete has a big problem with the power steering cutting out, and it pushes like a.... well like a WRX with no shocks.
I'll play with tire pressures tomorrow since my times are really bad (nothing to loose)... but the car on concrete NEEDS shocks something fierce. If I cannot fix the roll rates, and SEVERE understeer, and loss of power steering.. I'll have to give up on 2009 WRX for DS.