That sure sounds abnormal. Have you put anything on your phone that could result in increased battery usage? Perhaps you could take a screen shot of your battery graph like the ones below.
Here is a shot of my 21.5 hour usage, with 20.5 on battery. If you look at the second graph, you will see that I put it on charge twice when I was driving to my office at about 20+ minutes each. (During my drive, I use an app called "Waze" that sucks the battery for GPS and constant feedback to the website, so it's plugged in.)
Other than about these two charges and one charge when I went to the theater at ten minutes, the phone was on battery. I used the phone moderately during the day: about 30+ minutes on the phone, surfing the web on 4G for about a hour total, reading and drafting emails throughout the day, and a few downloads and uploads of photos. I would suggest that these results should be typical of what you can expect with an Epic 4G Touch.
I have downloaded about 50 - 60 apps.