In Colorado at CORRC it's 17.5 open ESC, 12th 17.5, and then 13.5 WGT (10-25 entries, most people run multiple classes, 7 - 14 bodies).
At our smaller track eTeam Hobbyplex it's 12th 17.5, VTA old rules, 13.5 WGT, than TC 17.5 (10-25 entries, most people run multiple classes, 6 - 13 bodies).
We've also seen attendance drop dramatically in the past few years. It's very sad, we used to have 45 to 60 entries on a Sunday for carpet. Early 2000 to 2007 our outdoor program at two location where getting 60-80 entries each on a Sunday. It's been a downhill slide ever since 07'.
Some people have just stop racing and many others have converted to off-road. The indoor off-road track in area is currently getting 60-80 entries every Wed and Sat. I've noticed many of the tracks that broadcast on LiveRC are very similar to these numbers. It seems off-road is where it's at right now. Hopefully things will turn around in the next few years and some of the off-roaders will move into on-road or those that got burned out will comeback.
Now that things have leveled out some with ESCs and BL motors maybe on-road classes will stoop changing on a monthly bases... which is probably part of the reason on-road has suffered lately, too much change too quickly.
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