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I like Ken's blog and think he tells it more like it is from a working pro perspective, and less from a pixel-peeper's.
I didn't realize that winning a photo contest in your local newspaper made you a "working pro"...
Well whatever. I don't know whether or not he won a newspaper photo contest but most working pros couldn't care less about res charts or megapixels. And I don't even like his photography but its his anti-gearhead and anti-forum photographer attitude that I find refreshing. Michael R is sorta the same way, just polite about it.
Its almost a cliche, but I've noticed that the forum conventions are the very opposite of those who are out there shooting every day. Whether or not KR is an actual working pro, he's sounds a lot more like the type. There's some condescension in a lot of what he writes, but theres truths in there. Everything from the silliness of the MP chase, simplifying our gear to get better photographs, the fallacies of digital, the beauty of some of the older film stuff, etc. Yes, he's cocky, but so are a lot of pros. Petteri Sulonen's biting diatribe on telephoto's being for cowards for instance, pisses off gearheads but most who strive to shoot people creatively see the truth in that.
Besides, for all the derision Ken gets over the years people still are quoting him. Its intriguing. There's even an anti-KR site. That's pretty good notoriety.
Don't get me wrong, he's pretty pedestrian in comparison to REAL photog bloggers like Chase Jarvis and Joe McNally, but KR's in the ballpark and an interesting guilty pleasure when I switch into gearhead mode and Strobist isn't doing it.
Look at those who jumped on the D3x hater bandwagon. At least Ken's honest enough to acknowledge (though in a somewhat veiled way) that his assumptions were wrong.