I have made link tests and put these on my website.
See here the result.

NV2
http://www.wirelessinfo.be/index.php/li ... 1km-ecee-e

802.11 AC
http://www.wirelessinfo.be/index.php/li ... 1km-ecee-e

Hopefully this is useful

Speed is quite low.
I have a working link that top up at 220mbps TCP, test between RB750gl (100% cpu) and RB1100AHx2.
With a better router instead RB750GL, speed would be higher. Protocol used 802.11

I try later with a RB3011 and set the result online.
Thanks for reply

I forgot to say that signal is -30. Maybe this is the reason for better results.