NotABunny said:
The fact that some people prefer speed over resolution is another matter.
I don't prefer speed over resolution. I want both speed AND resolution. The $1,700 7D shoots 8 FPS at 18 megapixels, so not only is the technology there, Canon has proven it can be done at a reasonable price point. I fully understand that resolution is king if you're making a living doing portraits or weddings, but in the type of editorial work that I do, images rarely run at 100 percent. If I shoot a six-page story for a client, there's usually only one - and at most two - two-page spreads in the entire layout. Even the 12 megapixel 5DC is plenty.
It's easy to fixate on FPS or megapixels, but in practice, the lame AF system Canon puts in most of its bodies hurts speed more than anything. Let's say I'm shooting pan blurs of cars going down a race track. I need an AF system that's both fast and accurate. It needs to focus quickly, and lock focus on to the correct part of the car. To get any decent amount of motion blur in the cars' wheels or background, you can only count on 30-40 percent of the images being sharp, even with the latest and greatest IS lenses. Throw a POS AF system like the 5D's into the mix, and you can cut that "hit rate" percentage in half. So, the faster and more accurate the AF system, the slower FPS rate you can get away with. If a body has neither a fast AF system or fast FPS, it's the worst of both worlds.
The 1DMKIV is an excellent machine in the AF and FPS department, but it still lags behind in image quality to the 1Ds and in high ISO performance to the Nikon D3s. Throw in the fact that the D3s has a full-frame sensor to the 1D's 1.3:1 sensor, and the only thing the 1D has on the D3x is megapixels. At the end of the day, you either deliver the product your client wants, or you don't. The only place blaming your equipment gets you is the back of the unemployment line. Do you really think you can tell your cleint, "Well, I should've gotten you the shot, but my camera's too slow, but that's OK because the other images I've submitted to you have a ton of megapixels," is really gonna fly?