There was talk about this last year (or earlier then that) and I remember thinking the same thing but the article I read it from made some interesting points.
I think the main one was that the International Space Center is in a geosynchronous orbit close to Nova Scotia so the distance needed to travel there would be shortest from somewhere around here.
I would have thought the sling-shot effect they get from launching near the equator (ie. Cape Canaveral) would offset most of this but I guess not.
