Hey Cherry, I don't think you realize how loose some outdoor tracks are. I've been to Mike's in Bellingham, and that's high traction compared to the outdoor tracks in my area.
Last week I went to R&L Hobbies in Tonawanda Buffalo, I didn't see one MM buggy there. That track was quite slippery too unless you have the right tires (super-soft Ions). I'm not saying for sure that MM wouldn't work there, but if there are 25-30 guys all running rear motor, well, what do you think that means?