I'm not sure if this is another Win 10 issues or just the Surface 3 in general. But I have Comcast with 80/12 service and Comcast's AC WiFi router. The sync rate on my Surface was showing 700+ Mbps. Two speed tests gave me roughly 6-8/2 Mbps. Other systems in my house will pull 80/12.
The sync rate gets poor sometimes on the other end of my house too. It will report 6 Mbps but seems to speed test faster. Having the tablet horizontal instead of vertical seems to slow it down too.
The sync rate gets poor sometimes on the other end of my house too. It will report 6 Mbps but seems to speed test faster. Having the tablet horizontal instead of vertical seems to slow it down too.