I know quite a few photographers, more online than in real life, but perhaps I just run with a more technical group who does seem to care in general about their IQ and how well the hardware caters to IQ.
That's explains it right there. The internet has a way of grossly distorting niche and micro niche markets. For every pro photog I "know" on the internet, I know 10 real life pro photog colleagues and competitors I rub shoulders with on a daily basis. Sites like Canon Rumors naturally attracts a far more tech savvy demographic. It doesn't mean they're better photographers, but they are far more tech savvy. The only reason I'm aware of these of DxO testing and some of the more technical aspects of camera design is because I stumbled upon Canon Rumors, and the only reason I stumbled upon Canon Rumors is because I was researching the latest 5DIII rumors online, since I was beyond frustrated with my 5D's AF system.
As artsy-fartsy types, many, many photographers that are highly talented and produce incredible work aren't remotely tech savvy. I don't say that as a criticism or a compliment, but that's just how they're wired. A buddy of mine, who produces some incredible work, has been using his 1DsII professionally for 7 years, and the grips are worn smooth at this point. I mentioned what a workhorse it's been for him, and as he said, "yeah, I like the IQ and handling a lot. I think it has 11 megapixels." Now, this is an extreme example, and I was shocked that he didn't even know how many megapixels his camera has, but it does put into perspective how tech specs aren't nearly as important to some photographers than to others. It's not too different from an art director that swears that he can't do his job on anything other than a Mac, even though Macs and PCs often share the same processors, video cards, and software these days.
Don't get me wrong. I don't see any advantage of being this clueless, and it can hurt you if there are better tools for the job that you are simply unaware of. That said, this does reinforce how good all pro and semi-pro DSLRs are these days, and underscores how performance metrics that are HUGE issues online aren't nearly as big of an issue amongst most working pros.
I blame this on how the internet can grossly distorts niche markets. For instance, only a very small percentage of the general public modify and drag race their cars, and a miniscule percentage of that demographic builds 2,500 horsepower drag cars. However, if I hop on the right online forum, it makes it seem as if freaks like us are a dime a dozen