Just taking some numbers from a recent LA Times story about the volume of sales so far in 2001. I checked the Subaru numbers and they are like well below all the major manufacturers. Subaru's numbers were lower than BMWs. I think the only notable manufacturer that had less volume was Porsche.
So I'm inclined to say that Imprezas won't saturate any one area.
[This message has been edited by asusimpreza (edited April 12, 2001).]