Thats the maximum from the CO/RT you can get "double" the speed. 6,000 feet you get 15.5Mbs. 7,000 feet you get 12.5Mbs. 8,000 feet it's a wash. Has anyone noticed that from 9,000 feet on, you get WORSE speeds w/ASDL2+ vs ASDL2?. Of course, it's just a chart...but...