...and he replied back about how shiny my cams were and just generally made us feel unwelcome.
My standard retort for that one is: "Listen, dumbass, I wear out three racks every year and send the worn out junk back to the manufacturer for testing, and they send me new stuff for free. If that old stuff of yours still works then obviously you don't get out climbing enough."
(I actually saw local Josh guide Dave Mayville drop that line on a guy once. It pretty much cut him down to size, which is of course what Dave loves to do.)
edit: PS, If the guy had to work on the route before he could climb it, it wasn't a "flash." If you run into him again under similar circumstances instead of complimenting him, tell him "it's a bummer you didn't get it first try for the flash..."