Not so much a sighting, but surprising reaction. I bought B&W C5's the other day and though I loved the sound, they were so uncomfortable to me I took them back today (I have P7's on order coming tomorrow.) So I walked into Best Buy and walked over to the returns area. There were 2 girls and a guy behind the desk. I set the headphones down and the girl that wasn't waiting on me says "You're returning the C5's!?!?!? Those are my favorite headphones. I love mine!"
All I ever see is a few guys at work have Bose QC's.