Ok, I am new to this jeep thing, and yes I drive a JKU AND take my kids to soccer (don't roast me), but I wave at all Wranglers and rarely get a wave back! Is it b/c I am a chick that I don get the wave back?
Is it because you have tinted windows, and/or your doors and top on, that no Jeeper can see you wave?
This is the problem doing a Jeep wave with the newer Jeeps, especially here in FL. Jeeps were traditionally open vehicles, so a wave out the side (after all, you don't have a door there, right?), or even one inside that was well lit from the sun getting in (open top, Bimini top), was easily seen.
I don't even look toward newer enclosed and tinted Jeeps now. Number one: you can't see them wave - or if you do you have to look too hard for it, and that's distracting away from safe driving practices.
And then there's this: (Now this is the ugly truth - don't hold it against me)
Most are fully enclosed with doors and tops - Many CJ & Wrangler owners just see them as SUV owners, not open to the elements Jeep owners. They'd have owned something else affordable and enclosed if it was deemed 'cool' - like if they still made H2 and H3 Hummers, but sold them for the same prices as 4-door JK's. As it is, the Jeep JK 4-door is the only thing on the market like it anymore, and are affordable compared to what the Hummers were. But if an owners rides around like they're in a Hummer or a too-cool-for-a-mini-van mini-van, they'll get few waves. Open it up, get sun cancer like the rest of us, and I bet they'd get more waves.
I'm as friendly as can be to newer Jeep owners when I meet 'em. There's a certain closeness in meeting or seeing someone face to face, and that extends to those of us out in the weather; that closeness doesn't exist when I can't see them in their dark boxes. Case in point: Just last week I had a friendly conversation - a yelling one at that - with a black guy in the next lane over, but one car ahead, at a traffic light. He was in an open Jeep, and I was in an open Jeep. Jeep wave? Hell - Jeep yell and say "Hi!" (after all, he didn't have any back windows to hinder the conversation, and was looking at my Jeep just like I was looking at his) "Neat ride! What Year?" ... "Oh, you want wheels like mine?" ... "I like your color the best."
If you aren't able to do that, then you may not be using a Wrangler as a Wrangler, thus the wave just doesn't transmit as well.