My experience (yesterday in a medium/fair Verizon coverage area with OLD towers) is that the browser is so fast that the mobile speed test (
http://www.dslreports.com/mspeed) fails - even on the largest file. I think it downloaded 1MB in 1.2 seconds.
So my comment to the OP is that either:
1. You are on a corporate network and using that browser (unlikely with the majority of Storm owners)
2. You have a bad phone (radio is bad)
3. You have a lot of crap (software) on your phone that is slowing it down
4. You have a memory leak that is causing browser to be adversely affected
That's about all I can think about...