I used to have the Hero with fresh rom and the 3g speed was very good in my town, I changed for the EVO on June 4th and the first two weeks the internet was the same with no problems, I rooted the phone (full root) and I noticed my internet was slow and intermittent in same locations but I did not pay attention at that moment, I had to return my phone bc the gps not working and they sent me a new evo and for the first week the internet was the same as my hero but I rooted the phone again and my internet is slow again.
and no way to get it back bc we can not restore our pri version.