It looks like our forum software can't handle the format for Eric's link. You'll need to add the "!" (exclamation mark) into the URL manually, I'm afraid.
The article is worth reading
Regarding the 5D Mark III, I would rather wait for independent tests of production samples before judging how well its specs translate into results. But from what we know now, it looks to be priced too high for what you get - certainly compared with the D800 (25% more).