Upload & Sell: Off
FWiW, I'm just back from two weeks shooting in the Algarve (and elsewhere in Portugal) where my 5D3 performed flawlessly over 1700 clicks using 16-35 f/2.8L II and kit 24-105 f/4L IS, as well as a few with 24-70 f/2.8L and 70-200 f/2.8L IS. Travel photos, long exposures using Big Stopper (and 5D2 RRS plate for tripod mounting, in lieu of 5D3 plate), action shots, portraits, and a range of conditions. Not a single error, no lockups, no hot pixels, etc. I reviewed each days shots on my iPad 2 and quite happy with what I was seeing. I'm now halfway through initial processing of RAW files in LR4.1 RC and the quality is outstanding.
My camera was sourced via pre-order from Calumet, arriving as stock around March 21-23 and delivered to me 3/23 (via a friend in NJ at the time). And if it matters, mine was a kit (only thing available, so I took it ... And the 24-105 has proven a worthy travel workhorse).
Note that I've been using a 5D2 since it was introduced and completely agree with the separate comments regarding AF point illumination; very disappointing. I've resorted to first pressing AF selector button ... But shouldn't have to. (I've also activated joystick to act as AF selector, which is more responsive but not as useful since the entire grid doesn't light up).