Lots of Progpower vs. Powerfest comparisons in this thread, and I think people fail to realize that they are two completely separate festivals. It's natural to compare them, since Glenn has built the premier American metal festival, but he also built it around a pre-existing online community/fanbase. I think that leads to why people say there is a "festival" feel to it - they all get together with their little online buddies stemming from the old-school Perpetual Motion forum for several days.
Aside from this forum and a handful of Chicago-area scene regulars, Powefest doesn't have that type of automatic fanbase, and that seems to be forgotten or ignored.
Personally, despite my love for many of the bands that ProgPower features, I have yet to go and probably never will, since I have better things to do with my money than travel to Atlanta. I did attend Powerfest last year for Iced Earth and Testament, and am eternally grateful to have the chance to see IE's first show with Barlow back at the helm in our area, and Testament the night after.
I'm actually glad that Powerfest's focus is on different bands featured at ProgPower, since they'd just be compared to Glenn's fest even further. It's nice to have two separate festivals in the US that feature different styles of bands. I think it sets Powerfest apart, unlike some of the other fests that have popped up (
BARF.....est ) that just take the Perpetual Motion fanbase and try to get them to travel across the country. Plus, they picked a horrible acronym!