I've been to a couple of the USCA events, both as worker and driver, and have to agree that they are exceptionally well-run, which is purely the result of the passion (a word I genuinely hate) we all have for the hobby (avoiding the term "sport"--we all have mirrors here). Many of us have just as much fun watching and hanging as we do driving (for far fewer dollars, might I add).
Chad made the exceptional point here (of two): We drive in these events (most of us) to have as much legal fun as possible with crazily capable cars. The USCA events give us the course/track time to literally beat our cars to death. Other events that involve autocross, not so much, unless it's a weird day. USCA gives decent value for those really trying to squeeze the most from their contraptions.
On the topic of the Evo (and other modern cars of its ilk), I remember Mike Maier consistently beating them a couple of years ago. They've chosen to up their game a bit more than Mike has this year . . . When I saw full-on tractor-trailers (not talking Greg Weld rolling out the barbecue here) delivering loads of fully-prepped, non-street race cars at Thunderhill earlier this year, I could see very well (or not, since I didn't really care) that something had changed (or didn't). What-evs. I wasn't likely to ever actually compete (like most of us here) . . . but I will also never pay to see a new Camaro or Mustang lap a track.
I just want to see the Dusold Camaro in person--that thing is ridiculously awesome (and only a Camaro by suggestion/sheet metal--look closely). More importantly, I get the sense that a lot of people pass it right by (on foot, not in a driving sense) . . . this inspires my own idiotic and stagnated build.