so there is two tests, one test and after few seconds - second test.
no changes, no move just chrome open new tab and repteat test
DL 2.75Mbps / UL 102.40Mbps
vs
DL 321Mps / UL 416.29Mbps
vs
and third test : DL 370.81Mbps / UL 463.15Mbps
fourth test with distance about half meter : DL 343.02Mbps / UL 517.73Mbps
so wehere is comment from MT ? 
http://forum.mikrotik.com/t/hap-ac-lan-wifi-5ghz-performance-issue/118005/15