Before I worked down through all the posts to see AWCHIEF's report of a conversation w/ the Blue Ox rep, I was going to ask if you perhaps talked with him right after their lunch hour, perhaps he's old school and did the 3-martini lunch.
To their credit, Ford's info says a tendency to sway probably indicates that your trailer is improperly loaded or you're going too fast, and suggests you correct that rather than relying on their system completely. They don't seem to claim to do anything with the trailer brakes, just the truck brakes. I'd say that a hitch that reduces sway coupled with the anti-sway braking system would be a GOOD combination, someday when I buy a newer truck I'm still going to use a sway-reducing hitch.