Huh, my 1DMKIII goes down to 50 and I sure use it a lot with the 85L. It's the latest of Cannon's professional line, it doesn't say 50 it says L for Low and the same way with the 5D classic I had and I believe the 1DsMKIII as well.
I think Canon's doing their best to do a good job here, we cannot expect a smaller sensor to put out what a full frame sensor can do when using the same technologies and sensor design. If Canon made all new versions of all models to be developed at exactly the same time and to be released on the same date, the comparisons would probably be more accurate, but in this day and time, a camera that is introduced a year later than another is bound to have the differences that Canon believes from their research that the majority of the public will buy.
I as a consumer ask for huge things to happen because I want it now. If things weren't so hurried and technology changing so fast, I wouldn't be hearing people ask when the next 5D model will come out when the current one has only been out 6 months. In this regard I really miss the good old days of film, where the photographer had to learn to expose whether there was a meter in the camera or not, where your lenses were kept for many years until sometimes you physically wore out the mechanical mechanisms, where the photographer had to focus the camera themselves (It really wasn't that bad folks, now we want the Genie to do it for us, which is great for some of us older folks with tri-focals but a good split image ground glass was pretty darn good. ISO was left up to Kodak, it was called ASA then and to change it, you had to change the film.
So that may all seem so archaic now but one thing that really was better, people didn't complain about their equipment so much, or blame their goofed up shots on the camera or worse yet, the manufacturer. If your photographs were out of focus it meant you missed the focus, if they weren't exposed right then you blew it and learned to get it right.
The computer evolvement has caused everything to go faster, not necessarily easier because I think people are being pushed harder and for more hours because the competition is coming at them so fast.
But the one thing that doesn't change - talent.
Or like in a recent blog from Joe McNally who'm I like a lot, he said a guy was telling him he had all the latest heavy duty pro gear, knew how to operate it flawlessly but one thing he couldn't get a handle on, content. Good grief!
But I love digital photography with a passion because it does free you up to be able to do so much more and as for the high ISO thing, I was shooting last night, faces of people at work and it was practically dark, ISO 6400, f1.2 1/100th of a second. Yes it had noise but also yes I was able to get what I wanted and the photos will be used on the internet and not very big so I walked away with something that I simply would have never been able to get before, there was no possibility to light it, it was during a performance, shots of the guys running the lights and visual displays on their computers, also thank Goddess for Lightroom which with burn and dodging I could help the absolutely horrible light enough for some pretty nice compliments and that felt pretty good.