I don't see why 25Gbps symmetric would be so surprising. My current ISP Ziply Fiber offers 100Mbps, 300Mbps, 1Gbps, 2Gbps, 5Gbps, 10Gbps, and 50Gbps (all of them symmetric) in most of their service areas. I’m sure there are other providers with similar offerings, in some parts of the country. My previous ISP, Sonic.net, offers speeds up to 10Gbps. The reported price is pretty nice though.