I have a Sport Space Gray (42mm) with black band, and I've actually seen quite a few more of them than I thought I would:
1. I work for a fairly large employer, don't get to interact with everyone who works for this company much, but a colleague who needed IT help happened to have a Stainless Steel Space Black 42mm, and we both geeked out for a moment remarking on our watches. This was a month after launch.
2. Mid-July, eye doctor appointment. He had four assistants running around and all of them had apple watches, all sport models, silver, with sport bands (green, blue, pink, white). I inquired about it, and one of them got it at launch, and the others thought it was neat and followed suit. Not bought for work-related purposes.
3. Two weeks ago, going out with friends at a diner, saw a guy at another table with the exact same model watch and band as mine.
There's one or two other instances, but I forget details. In all I'd say I've seen about 8 or 9 of them, other than my own, outside of an Apple Store/other place that sells them, on a person's wrist, and in public. So far I'm the only person among my friends and immediate co-workers that have one. Though many ask me about it and keep saying they're on the fence or want to buy one, but either feel it's too much of indulgence, or have significant others who would probably scold them for it.
This is in the PA/NJ/NY area. In all I'd say this is about on par, or even slightly above, the number of original iPhone sightings that I saw the first year it came out.