My 1D3 came back from Canon on Friday. I have to say the service from Canon was quite fast, only about 4 business days including shipping time. I had a chance today to head to the Palo Alto Baylands and do a little shooting. I didn't really have any complaints before and I still have no complaints, the AF seems to work quite well. I have updated my Baylands Zenfolio Gallery with a few of today's shots.
Technical Specs: Canon 1D3, 500mm f/4 + 1.4x TC (700mm equiv.), f/5.6, 1/500s, ISO 800.