Yes, all the time!
Weirdly, I get let out more often than expected - mostly by 'man in the van' types, whereas your usual 'exec' or 'bint in 1-series', gives their deadpan, lifeless look, and ignore you.
Have had some great reactions in the ED30 - sadly, mainly from dudes, but it is quite funny at times! Some guys passenger in an open top Z3 did a near on 360 degree head turn to look at the car. I loved the time a gorgeous lady's little lad started pointing at the car as they were walking over a junction - think it was the xenons that got his eye.
Some of the worst are from when peeps expect a 'race' because of the car. Don't get me wrong, I enjoy the performance of my car - I will use it to the full, when it is safe, but that is rarely on the public roads.
Nothing compares to driving it on track though...
A 'gentleman' in a van took exception the other day when I went past him on a dual carriageway into town at WOT - I only went to the speed limit (40mph), and then he was on my tail, lights flashing, and then undertook.
He actually gave a friendly wave (with all fingers) when turning off the main road, so really not sure what he was trying to do....