802.11ac wave 1 is 1.3Gbps theoretical max, Wave 2 is 2.3Gbps or so theoretical max. But that's half duplex. And it's shared amongst every station on the AP, so it'd be rare to see consistent gig speeds for a station anywhere other than a lab or perfect test setup.
Also he says a separate high bandwidth signal coordinates the units, would that limit range? Why not a lower bandwidth signal?