Horses for courses though, I find Nikon to be some much more logical in controls because it's what I always use. I don't need the manual to operate Nikon bodies. On the few occasions I've used a Canon I've spent ages trawling through menu's and trying to work out how to switch modes etc and like your experience, I was unable to get to AV mode for ages.
It's just what your used too when it comes to UI.
Its the same for me. I really wanted to get a Canon body b ut they were all so uncomfortable and unwieldy, with really obscure button placements that made no sense. I painfully got a finger trapped in a 350D once. I spent hours in the shops playing with Nikon and Canon bodies, most of the time was spent trying to learn the Canon bodies. With the Nikon D70 it just sat in my hand perfectly , all fingers in the right place, buttons where they should be and rally simple and obvious menus and controls. But I wanted Canon so was determined to figure it out. In the end I realised the Nikons were just naturally good to hold.
This seems to be a general trend with Nikon bodies.
back on topic:
I heard the high ISO performance might be acceptable,. Bring on the price wars!