Although I've only got a little over 5000 miles on my R3T, I've parked next to, or pulled up alongside quite a few bikes. And around here that means mostly Harleys. I have yet to have anyone ask if it was a Harley. Maybe if I leave it out in the rain and it really shrinks up...
A couple of weeks back I walked up to a guy examining my bike. Turns out he was one of the original design engineers on the Hesketh. Interesting fellow.