Other than purposefully setup meetings with other Alden SF members, I have never had someone tell me that they recognized them as Aldens. I have had a sprinkling of compliments in person, but not many.
Most of my San Diego co-workers know I am a shoe aficionado and they just assume I am wearing nice shoes. I would be more likely to hear, you are wearing those than nice shoes.
I have been asked once while in Washington DC by a co-Worker if the boots that I was wearing were Shell Cordovan, I was wearing my #8 Dr Jones Boots, and now a lot of my DC co-workers now know I spend too much on shoes also.
The only place that I have truly spotted in the wild Aldens is on the NYC Subway (Color 8 Full-Straps), on the way to having breakfast with a member here, and I have seen a few pairs within a block of Alden SF. But I am not sure that counts.