Go look at that thread too. It is ridiculous. He's a brand new user who just started one thread called "IAMA someone who 'leaks' information about Microsoft's future plans. AMAA" and in it he says "I do not work for Microsoft, any of it partners or contractors" yet he seems to know everything about a wide variety of things inside MS from dev tools to Windows to xbox, I didn't see a single "I don't know" reply in the thread. There are a lot of redflags in there on that being a huge load of BS.

"an insider with a good track record of leaking unannounced information regarding Microsoft’s plans"

It sounds like he/she has successfully leaked information before.