A comic fan recently attended a local convention and enjoyed all the costumes people were wearing:
One of the more impressive costumes I saw there was a really well-made Batman costume which I noticed once across a crowd, and later from a little closer up (though not face-to-face). This was the only person I saw in a Batman costume.
A few days later, I was meeting with a friend, and told him I had gone to the convention. “Did you see [a close mutual friend, whom I've known for close to two decades]?” he asked me. “He was dressed as Batman.” He then directed me to our friend’s facebook page, where he had posted pics of himself in a well-made Batsuit costume.
The very same Batsuit costume.
So, would Bruce Wayne’s close friends recognize him as Batman?
I sure didn’t.