I think we can have every confidence that Canon will right this, the Eye-Fi problems and lens IS issues. It would be devastating to their image not to (and potentially the images of their customers
). I expect we will hear very soon their plan-of-action and I also expect a global recall for affected devices (all sold units, basically).
It is great that the customer is so critical of the products so that Canon themselves can build on what they have and will deliver in the future. Does all this talk affect sales? Of course it does. Will it affect Canon's profit margin and thus future research and development for new gear? Of course, but only to the most minor and negligible amounts. Let's face it, Nikon is also "struggling with production problems," with back-logged orders stacking to the roof, most likely to cover for their own array of fixes they have to implement before shipping the next batch.
Cameras are complex pieces of kit, let us not forget that; the odds of having something perfect out-of-the-box in such high-competition, fast-paced industry is quite low. Luckily, because of this competition, all we need to do as consumers is voice our concerns and the manufacturers will heed our calls.
In the meantime, get out shooting with your mostly-working 5D Mark III. Take photos: isn't that what photography is about?
(As for those with an inferiority complex envying the D800 mega-pixel count, you should have made a fuss about it while the 5D Mark III was still in the research and development phase. This is one thing a recall won't fix - that is, unless every 5D Mark III out there has a defective sensor - with the noise performance I am getting with my Mark III, I question anyone who could consider it the least bit defective.