A curious thing I noticed that my Kitchen (wired in eth) was for a moment giving 10/100Mbps connection, and my phone connected to it, so I tested and it gave me 100Mbps down and 90Mbps up lol. But after I rebooted all units and re tested (came back with the 2.5Mbps connection) and uploads were crap again. Also downloads never seem to go beyond 400Mbps on all my testing in WiFi (wired is as intended for download).
This after a reset? Also, very anecdotal, but just casually looking on the net, I see lots of complaints about Asus Zen Wi-Fi units and Verizon FiOS.