one of the thread posters was going on about the deficiencies of the AF and metering of Canon's cameras...was curious what he was talking about (we all know the limitations of the 5D's AF system, but metering is a new one for me).
That was me . For the past few years I've regarded Canon as the innovators, making mistakes along the way as all innovators do, but ultimately advancing the science of photography. Nikon I've seen as "perfecters", taking an innovation that hasn't so far been given the research to fulfil its promise and doing just that. The fact that Nikon stayed so long with the c.12mp sensor created by Canon is an example. But it struck me that with the 5D2 Canon didn't do that - they took the sensor from the 1Ds3 and the AF & metering from the 5D, but didn't really advance any. That was what disappointed me with that camera and made me decide not to buy it. I did buy the 7D, which had some real innovations. I'm hoping that with the 5D3 Canon will resume their prior progress on the FF side.
As to the metering, I quite often shoot with friends using D90s. Both my cameras cost a great deal more than the D90, yet I often find that my photos, taken with either camera, are not as well exposed as their first D90 attempt. I don't know what the technical differences are, but it does seem that the Nikon simply works better.
It's like comparing my Macbook Pro with my admittedly elderly Windows machine - the Mac just works, and the Windows one often doesn't.