I got my first show at Javitz, second at a high school in Brooklyn. My wife got her first shot at a high school in Queens, second at a different school in Brooklyn. Her sister got both at Medgar Evers College in Brooklyn.
Each time we were in and out in less than 30 minutes including the 15 minute post-shot wait.
The lines at Javitz must have been that one day only, just a single cluster.... as they expanded service. When I was there (a few days before) the line moved constantly. Spent more time walking around through the corrals (like at airport security) than waiting.