Finally got my Unifi upgraded to 100Mbps last week. Surprisingly I find that the Archer C7 V2 is consistently slower than the DLink DIR-850L (RevB) on 5GHz.

Test setup:
- clients: 2016 Macbook (m5 version), quad-core i7 Dell Precision laptop both on wifi
- latest firmware on both TPlink and Dlink routers
- both set to 5GHz auto channel. Clients are 2-3m away
- tested multiple times back to back.

with Speedtest I'm frequently getting 80+/48+ Mbps on the Archer C7, but 102-104/51-52 Mbps on the Dlink 850L. Never had this issue at the 50mbps level and a wired LAN shows full 102-104Mbps bandwidth all the time so it's obviously something to do with the Archer C7 wifi implementation.

Just another datapoint for comparison purposes, otherwise I have no issues with the C7

2.08 for DLink DIR-850L Rev B
Can't access the Archer C7 now so can't check but I upgraded within the past few months.