Have you read their rules?
http://www.idpa.com/Documents/IDPA_DMG_rules_07062010.pdf
Less shooting, no movement, 10 rounds or less of shotgun per stage and you gotta conceal your long guns in a trench coat.
Just kidding about the concealment.
Thing thing that I dislike most about IDPA and all the forced rules is the limit on round count. Most gun fights are under 10 rounds so why shoot 18? If the reason is more shooting is just more practice them why limit it to only 18?
I am all for lower round counts to encourage shooters with less ammo budget to shoot too. Its just hard to spend $50 on gad to druve to tulsa to shoot $20 in ammo. With tgatcsaud I know Jerry puts in a good match so ill give it shot because i love me some 3 gun.
I think you will get more shooters with USPSA or outlaw 3 gun rules.
Actually, movement is required for at least 5% of all shots in an IDPA match. Movement is restricted to no more than 15 yards in each stage to prevent it from becoming a foot race.
The reason for the 18 rounds per string of fire is more about equipment than ammo. They set IDPA up so that those who live in retarded states (with a magazine restriction) could compete head to head using 10 rd mags, against the rest of us who live in free states. The 18 rounds total is so that someone on a budget could show up with a gun and two or three mags and still be able to complete each course of fire. Same for a guy with a revolver and two speedloaders.
You can literally be competitive in IDPA with $600 in gun & gear. The same money in USPSA might not get you to the end of a large field course. I'll admit that some of the rules are retarded, such as all reloads must begin and end behind cover if cover is available in the stage. We try to counter some of the dumber rules through intelligent course design. Overall, IDPA was designed with the self defense user in mind. This is why IDPA is currently growing much faster than USPSA, and will likely eclipse them in the near future on total membership.
I realize that it's difficult to justify driving a long distance to shoot 80-125 rounds at a pistol match, which is another reason I prefer to run a dual format for DMG. With that, you'll get 150+ pistol rounds, and close to the max allowed number of long gun shots over 6 stages. We'll also allow non-IDPA legal guns to compete in "Outlaw Division". Hopefully these allowances will be attractive enough to bring the shooters out.