If you go to:
www.broadbandreports.com
and muck around a bit you can find the DSL recorded speeds for your zip code.
The average will likely be around 1100 for your area.
kbps is determined by distance from the office. 10k ft is about average. You can find out from the ADSL ISP on line or call.
I much prefer cable to adsl and pay the extra $15 per month premium for a consistent 2925 kpbs.