I`v made a lot fo tests of MT`s indoor wifi in the past and my result was not good for MT.
I`ve used AC2, AC3, RB4011 in my test ant try AC2-AC2, AC3-AC2....and all APs vs clients and made tens of tests.
Max speed in 2.4GHz was abou 100-120Mb/ and ~200Mb/s in 5GHz.
New story.
I was replaced some TP-Link over AC2 in the customer`s a few days ago.
Customer has optical connection 350/70 and I could see incredible results of speedtests.
200Mb/s in 2.4Ghz and ~330Mb/s in 5Ghz (I`v never seen it before).
I tested in via my nb with Realtek RTL8822BE and my phone (Huawei P20 pro).
Unfortunately I can`t remeber what ROS was in AC2 but it was new piece and I bought about 10pcs a few weeks ag so I think there is some 6.4x ROS (I can unbox another AC2 and cehck it later)
I have no idea why I never coud measuring such results before and it must be miracle.
Any logical explanation?