Having trouble figuring out what is the maximum 802.11N throughput of the TriplePlay 150 (Slingshots UFB router)

I can only get 72Mbps next to the router with my new Intel 7260AC WWAN card (on a brand new machine), I can get plenty more connected to other routers.

Can anyone with that router comment on what the connection to their Wifi network is rated at (Using the Windows Network and Sharing Center, and clicking on the Wifi network you're connected to).

Documentation is missing for 802.11N throughput on the datasheet. 
http://www.energyimports.co.nz/_img/TriplePlay150%20spec%20sheet.pdf