It would appear Preston has just been upgraded, was scheduled for June.
http://www.speedtest.net/result/1303456005.png
Cable Modem Operation Configuration
Network Access : Allowed
Maximum Downstream Data Rate : 10240000
Maximum Upstream Data Rate : 1072000
Maximum Upstream Channel Burst : 8160
Maximum Number of CPEs : 1
Modem Capability : Concatenation Enabled, Fragametation Enabled, PHS Enabled