I give a little wave (or flash my lights) at every Porsche I see when I'm in my Boxster, my 996 or my 944.
The little community of Porsche drivers in my part of the world all recognize each others cars and are a pretty good bunch of folks.
I came out of the local steakhouse a few months ago and even had a Panamera parked next to my 996. He knew a good ride when he saw one.
Rick