This very much resonated with me:
"Specifically, I was very disappointed in my choice of taking a 100-400mm zoom instead of a fixed 400mm f5.6. Fully 85% of my keepers from this lens were shot at 400mm. At that focal length, the 100-400mm simply doesn't have the gas. Notwithstanding its branding as an “L” lens, it's just not up to meeting the resolution challenge"
I just experienced the same thing while shooting with a 1DmkIII. I can only imagine his disappointment with the 5DmkII's resolution.
I also share his general disappointment with the current crop of L series zooms.
"I was also disappointed by a lot of the shots taken with the 24-70 f2.8L under 50mm."
I have not experienced his specific challenges with the 24-70, which performs admirably at my lower resolution limits. I find the 28-300L to be marginal in just about all focal lengths and apertures at my working resolution, so it would probably be torture with the 5DmkII.
I came out of our year in South America seriously pondering going back to shooting primes, which is pretty wacky since I shoot 100% non-studio.
I initially went with Canon because I preferred their L glass over Nikon's crop at the time. I'm hoping Canon can make the lens development investments necessary to keep up with their bodies.
This also resonated, and brought a grin:
"While we're at it, how about some focus sensors on the edge of the frame, and not just the edges of the middle? Four points in the 1/3 corner intersections would be nice, and oh-so compositionally convenient.
Of course, only real photographers would know this, and since Canon is still putting a “Direct Print” button on a 21MP full-frame camera, I can only assume that real photographers are in short supply in the design and specification departments."
This review was helpful. I will probably still end up with a 5DmkII, since there are times out here where a smaller body would be very convenient and enable shooting situations that would otherwise be precluded. If I do so, I will be more informed and prepared after reading this.
Thanks for posting this link.