Yes I just checked the website (before seeing this post) and it now says "in stock and ready to ship." However I have not yet received an email from them that my preorder has shipped. I expect to see an email tomorrow (or maybe even late tonight).
Sure enough, there it is, the email confirming my order is packed and ready to ship. UPS link says scheduled delivery is Tuesday Sept 4, which is ideal because that is my day off work and I will be home to sign for it (and test it out that afternoon).
Overall, I still am very happy with my EF 70-200L f2.8 II, one of my fav zoom lenses. I think the new Mk III is more attractive for those still using the Mk I lens or buying into this class for the first time. In optical quality, the leap between the quite old Mk I and the Mk II was huge, the latter is much sharper, overall seen. Plus, AF etc. was much then improved by Canon, so it was really worth upgrading. But according to Bryan Carnathan, still one of my fav sources for reviews of new Canon gear, they didn't change the optical design, only used some more advanced lens coatings (https://www.the-digital-picture.com/Reviews/Canon-EF-70-200mm-f-2.8L-IS-III-USM-Lens.aspx). So I expect no or only incremental visible improvements for Mk II users when it gets to real life photography.
That said, the Mk III is surely a great lens, no doubt about that. So congrats for your purchase, MrFotoFool, I am sure you will not regret it.
That said, the Mk III is surely a great lens, no doubt about that. So congrats for your purchase, MrFotoFool, I am sure you will not regret it.