What partnership? That's my point we don't know what they are partnering about.
If you had read further, you would have noticed that he also said there was "no scoop" as the registrations were purely defensive -- to prevent others from registering the domains and setting up a website for a fake enterprise. Furthermore, "partner" is used in the present tense, so the logical conclusion here is that it was a poor word choice and he'd intended to refer to the two companies sharing (some of) the console space.
If you look at the date of the domain registration it was June 2011.
July 2011, but I digress. The registrations were more than half a decade ago now and there has been absolutely nothing to suggest that Shaw's tweet (posted just a couple of days later) was insincere. No announcement. No leaks. No rumours. There is no "Microsoft-Sony" or "Sony-Microsoft".
Jeff, do you plan on linking to the posts you assert Stinkles made about firmware updates? If you're going to make these claims without providing proper citations, I don't think you're arguing in good faith.
He's apparently avoiding the matter as not only was he was last online a little under five hours ago but also ignored both of Adam's earlier requests despite quoting one. This is one those instances where it'd behove you to display a modicum of humility, Jeff.