In SoCal, I see maybe a 5 to 1 split on JK's and 4 to 1 on JL's. The only oddballs will be JL 2-doors tend to be 3 to 1 female and White JLU's are overwhelmingly females, maybe 7 to 1.
In Utah I'd say it's a fairly even split in JLs and JKs. Can't even go by Rock Crawler vs Mall Crawler. Anyone can hop out of the driver's seat. You need to go back to the TJs, YJs and CJs before you tend to see more guys in them.
Four doors, close to 50/50; two doors, 7 to one male to female-two doors seem to used more for traditional “Jeep stuff” like hunting and fishing. Lots of 4 doors never leave the pavement.. Interesting stuff?