I just came back from two weeks in Europe, and I have to say, what I saw surprised me! I was thinking of this thread the whole time I was there.
Over here in the states, it's rare to see another Pentax shooter, but on the first leg of my trip, I was amazed at how many Pentaxes I saw. In Chamonix, France, I was out and it was drizzling. My K-x was safely back in the hotel room. I saw a camera with a nice lens on a table, and I thought, "that guy's ballsy, I wonder if he has weather sealing?" It was a K20d. For the first few days of my trip, I saw approximately 30% Pentaxes as opposed to Canikon's, which is pretty good! In all that, I saw no K-x's, and one white K-r.
Of course, those were the days that we were not around any tourists. In fact, the few tourists we did see were toting Canon or Nikon cameras.
Once we started going more touristy places (Nice, Florence), the Pentaxes disappeared, only to be replaced by Canikon.
What I found satisfying, but also sad about what I saw, was that only one Pentax person had their kit lens on. Every other Pentax person either had a prime or an upgraded zoom of some sort.
Nearly every Canikon shooter I saw had a kit lens. Not that there's anything wrong with that, but I think it bespeaks the fact that Pentax shooters are a more discerning breed. What's more, those Canikon shooters were primarily non-serious shooters. I think most of these people go to the store for a camera, and if they have enough money, they get upsold to a DSLR without really wanting one or caring. They just "know" they will get better pictures out of that camera so they buy it.
This sounds like I'm casting pretty heavy aspersions on these people, and I apologize if I plow over anyone, but you have to understand that I was beleaguered by mobs of tour groups from cruise ships in Monaco, Nice, and Florence. You couldn't move there were so many tourists. And I have never been so ashamed to be from the United States. These people were completely ignorant of the culture and almost proud to thumb their nose at it. So as I'm waiting in a crowd of nearly a thousand people to go inside the Duomo in Florence, dutifully wearing long pants and a respectful shirt, my wife with her shoulders covered (even though it was nearly 90ºF, it's the rules), I couldn't help but notice that the Americans men were there in their board shorts and Guy Harvey shirts, and the women were either wearing a tank top, daisy dukes, or both . . . all loudly complaining about the heat/food/cruise ship . . . and with a kit-lensed Canikon swinging from their neck.
I'm serious when I say that cruise-ship tourists, who were rushed to get back to the ship, too loud, and extremely rude to restaurant, nearly ruined some of those places for me.
Americans weren't the only ones, though. There were several groups of Asian people shooting DSLRs with kit lenses, and though they didn't exactly behave like inspired shooters, but they at least were quiet, dignified, and dressed appropriately.
Even the handful of 5D shooters I saw had their "kit" lens on, the admittedly beautiful 24-105 f4 USM, but still, nobody was thinking outside the box. And you could see it in the way they were shooting, too. Taking shots dead on, kind of halfheartedly standing with their tour group, not caring about how the picture looked as much as the fact that they got a shot of whatever it was.
It was actually soul-crushingly sad.
But to answer the essential question: No, I don't think we're that rare when you compare Pentax shooters like-for-like. When you compare the number of Pentax shooters with the total number of DSLR shooters, yes, we're rare. But not when you compare us with the number of skilled enthusiasts who actually take pictures because they LIKE to take pictures.