Castro Valley, CA
Around the same speed @ 3X the distanceJust a data point, my parents' Fusion connection is around 11K feet from the CO in San Francisco and they get around 3.2 Mbps. Originally their AT&T DSL could only get 1.5 Mbps. Lots of tweaking was required for their internal wiring since the house is so old but they're pretty stable now.
I just remotely pulled their modem stats and it shows
downstream rate: 3200 Kbps
upstream rate: 896 Kbps
noise margin 5.6 dB
output power: 12.5 dBm
line attenuation: 56.0 dB
I think those stats are very interesting. My line attenuation is quite a bit better (38-39dB), noise margin consistently 6-7.5 dB, distance from CO ~8K'. But I'm getting not as good upload and just about the same download speeds.
Just to head off the obvious inferences: Everything from the NID to the computer's NIC is new and has been tested repeatedly. It's all good. I get the same results at the test jack. The problem is clearly upstream and no one seems to know how to deal with it.