They offer 1 Gbps download in my area with 20 Mbps upload. And it comes with a 1.2 TB limit.
EDIT: I'm wrong. The Xfinity in my area is on cable.
AFAIK Xfinity (Comcast) is not deploying FTTP anywhere. It's a cable network on DOCSIS. The fiber usually stops at the CMTS which is far away from the home; one CMTS serves multiple neighborhoods if not the entire town.
Took another look at the connection info and yeah you're right. The Xfinity connection in my area is cable. Not sure why I thought it was fiber.