Thanks, ORAC...
I was going to respond with the H2G2 line - "They don't have sarcasm on Betelgeuse, and Ford Prefect often failed to notice it unless he was concentrating."
One problem is that the Marines have limited use for high speed. It's only worth the candle if the mission is V-22 alone, because otherwise your escorts and heavy equipment are going at helo speed. That's why special ops - where your limitation is often how far you can get in the hours of darkness, which are determined by Kepler - is an ideal world for the V-22.