Earlier quoted context omitted.
First of all, the quote, from you, specifically says "open Web" not "open Internet" Secondly, Reader was not killed because of G+. If FriendFeed is finally killed off, will you say it was because Facebook needed the resources and engineers on a competing product? Consumers have moved on to desire the kinds of features that are inherent in services like Facebook, and RSS simply isn't suited to solving the problem of f…
You're right; I've corrected that. You're also correct that RSS doesn't solve the problem of federated social networking. It was never intended to. W.r.t. developing protocols for federated social networking: Google isn't interested; it would harm their bottom line if users on their systems could easily share content outside those systems. Hence why Google+ doesn't even offer an RSS feed. Do you really, hand-on-heart…
If you look at G+, Google has taken a very very careful approach this time (after OpenSocial, Buzz, Wave, et al failed), building on it very incrementally, always concentrating on user experience at each step. Even to the extent that they don't have even have an API to post content to G+ programmatically. Whether or not it will eventually turn into some idea federated open network, I have no idea.
But I would not take G+ as somehow Google dropping support for the open web. Google is a very large company with lots and lots of product, and company culture just doesn't change overnight.
I'd love it if Google had done a disapora-like federated system. But honestly, if they had gone that route, we'd have threads all over the blog-sphere laughing at Google for yet another social networking failure.
Those kinds of projects earn the love and adoration of the hacker community, but they don't get grandma, teens, and celebrities on your site.
Want better counter-evidence? Look at WebRTC and Google Hangouts. Hangouts are a defining competitive advantage G+ has over all over social networks, and Google sponsors a spec that essentially makes them a commodity that anyone can implement now.