The iPad 2 performance is faster that the iPad 1. Factors that make it faster are that the iPad 2 has more RAM and a faster processor.
This speed difference can be seen in the Safari. Below is a video showing off the two iPads speeds via WiFi and their speed.
You can see here in this video that the iPad 2 loads apps about a second faster then the iPad 1.
Being a doctor, you don’t have much time, speed is of essence, so jump on board and get an iPad 2. i