The EPA gives the 2001 Echo (with automatic) a rating of 27 city 35 highway - brand new. here's a link so you can look it up for yourself.
http://www.fueleconomy.gov/feg/findacar.htm
So if you getting 26 around town and it's got 100k miles, you're doing pretty good.
People like to boast about lots of things and Echos may actually get into the 30's (on the highway, with a 5-speed, driving 55 mph)