I'm going to contradict the negative posts below: I have a Soma Oxford (basically, an Alba copy) on my 650B-ized Trek, and I like it quite a bit flipped. You can see it here:
Actually, I like it a lot better flipped than upright. I think a lot of this is due to the brakes: flipped, I used road levers (with an inner tube shim) to recreate the Albastache type feel. Upright, I used traditional mountain bike grips and levers at the end of the bars. In this mode, the grips always felt too high and too close, and I ended up riding on the front hooks anyway. Flipped, the front hooks become a comfortable, stable default position.
All that said, it is quite different from the Albastache that I have on my VO Camargue. The 'stache is wider and goes forward more, while dropping less. I prefer the Albastache in most respects, but I still enjoy the flipped Oxford as well.
Eric
Dublin, OH