Don't know when you tried to educate the USAF, Zoom, but I was privileged to serve under Brig Gen Fred Heffner who introduced "Fred's Spread" at Luke AFB in 1975. Believe it or not, this was revolutionary in the USAF because it involved the use of battle formation into the pitch to land instead of the more accepted close echelon formation.
Nevertheless, speed was limited to 325 kts and even that was a FAA deviation because the Wing had F104s that needed to be that fast to stay airborne.
Who knows, after 9/11 maybe they're up for 500 kt breaks now!