I disagree Sandy. If you have a camera that makes you feel confident, you can focus on the job more easily than with a dud. And honestly, the 5D2 and 7D has failed us more times than i care to count (poor AF, poor metering, banding in 5D2) and we almost jumped ship last year but I held my breath until the D800 came out.
When i look back at my photos from all the ten years I think the best ones i took were shot with 1-series Canon bodies, especially 1Ds and 1Ds2. These were probably the last true photographic digital cameras, without any bells & whistles. The confidence it gave us was amazing, the handling was superb. The "1" series cameras have that little genie inside that tells you - "relax, trust me, i'll do everything you tell me, in any conditions".
So having the D800 now gives me similar confidence. I've done two studio sessions with that camera now and the files are just mindblowingly good and withstand all sorts of processing which would make files from 5D2 and even 5D3 disintegrate completely. In high ISO situations it's also just great. In a way it reminds me of 1Ds2 files. I've been a fool to sell that camera in order to get into the HD-DSLR video hype. I would still buy it today, out of sentiment.
That's ridiculous, haha. If you really believe that a different piece of plastic and metal in your hands is going to make your photos more creative, make your vision come to life most vibrantly, then you're only joking yourself.
Calling a camera like the 5D3 a "dud", is non-sense. I shot weddings, with my 5D2, sure it was struggling in some areas with AF, I manually focused. I wasn't happy about it, but I did it. But I loved my Canon lenses, and didn't feel like switching would ultimately make my photos better, because photography isn't about all that extra stuff, it really isn't. Now that the 5D3 is out, I feel like the tool I have to shoot with is indeed improved, but even I do not kid myself; the photos I take, my vision, my creativity, will not improve.
Just because I love my Mamiya cameras, because I love the images, doesn't mean they're better than my Canon ones. What's in your head is in your head, and sure it's important, but the rest, what bleeds into the imagery, is all that truly matters in the end.
Your photos are not going to be more creative, they're not going to be more visionary or complete as an artistic expression. They're going to be the same photos you took before, with a different camera. Technically speaking, they'll have a bit extra of this, and a bit less of that, but they're still going to be coming from you.
You're a shining example of someone who blames the tools they use for their lack of whatever. I chose to do the opposite.
I don't care if I was shooting a damn Pentax, hell, there are some folks getting world wide attention over the past few years, getting spreads in major magazines, shooting action, fashion, portraits, photojouranlism, fine art, abstract, whatever.... AND USING 400Ds from 2003, using 50mm f/1.8 lenses.
And yet, here we have people complaining about the 5D3 vs. the D800, trying to make themselves believe that by switching to Canon, or to Nikon, that their photos are going to get better.
Good luck with that! 
