The person who owns that one has another nearby, and they are both killing it. I'm guessing he's not running the stock 1.2db antennae at 0 meters from the ground. Probably a 6-8dbi on his roof and he never updated the app, it's hard to get that kind of reach in that terrain without a big stick. Size does matter........
There are a few others in the area also making 4-6hnt.
There are a few others in the area also making 4-6hnt.