The "what Wilson sells" line is so tired!! I've shot a lot of IDPA and there are very few if any Wilson guns at most matches. IDPA is helping out Glock, Beretta, and Kimber a lot more than Wilson.
IMHO, the reason to keep out bull barrel guns, long dust covers, ghost rings, and a lot of other stuff has nothing to do with what people carry. Carry what you want and if your local club will allow it - shoot what you want - just NOT for score/awards. A local club here shoots by the IDPA rulebook with AR-15's. You can do what you want - you just can't officially call it IDPA or win any IDPA trophies unless you follow the rules.
I think it boils down to supporting the first Priciple of IDPA: "To create a level playing field for all competitors to test the skill and ability of the individual, not their equipment or gamesmanship." Another important line from the rulebook is "IDPA will NEVER be an equipment race; IDPA is about shooting, not equipment." IDPA will HAVE TO limit the equipment usable in IDPA competition if it doesn't want to turn into more of an equipment race than it is already. Beretta Elite II's, Glock 34/35, full size 1911's with mag wells - I know few people who carry these pistols. They shoot with them to win competitions!
Currently IDPA is very similar to what IPSC was in the early days. IPSC chose to not place many limits on equipment and has turned into a different sport - not worse just different. Since many of IDPA's founders were part of the early IPSC crowd, I think they are trying to keep history from repeating itself. We already have IPSC and its a good sport. IDPA is different from IPSC and if it wants to remain so it will have to have plenty of equipment restrictions and stick by those restrictions.
Shoot an IPSC Open gun and you may understand - .38 Super double-stack 1911, 26+ rounds per magazine, compensated with optics and you will see that equipment can make a big difference in both speed and accuracy. Where do you draw the line? For the game I want to shoot, I think IDPA is drawing it in pretty close to the right place.
[This message has been edited by vincent (edited 08-21-2001).]