I just had FiOS installed earlier today - the ONT was upgraded during the install, as I was upgrading from the 75/75 service previously subscribed to by my ex-roommate, to 100/100 and had to move to a GPON ONT.
Prior to the previous service being disconnected last night, we were receiving 85-90Mbps down and up. Since upgrading, on speed tests I am receiving 8-10Mbps down, 95-120Mbps up. The connection is unusuable - I cannot stream video without constant buffering, pages are loading slowly or just timing out, downloads are taking forever. This is enormously disappointing and inconvenient given that I expected to receive a speed upgrade, and last night on a 75/75 connection everything was absolutely fine.
I have tested the connection via WiFi, wired ethernet on two different PCs, and using the Quantum Gateway as well as my own router (Asus RT-AC87) with the same results. The tech that performed the install said that there was likely an issue in the area, and that I should give it some time and see if it improves, but to this point there has been no change.
I am very unhappy with the service I signed up for at the moment.