You would think so, but you underestimate the new Xbox management.
But don't take my word for it, listen to bkilian:
http://forum.beyond3d.com/showthread.php?p=1696487#post1696487
http://forum.beyond3d.com/showpost.php?p=1702364&postcount=1299
This was before the first always online rumours appeared.
Some of his other posts on always online:
http://forum.beyond3d.com/showpost.php?p=1702364&postcount=1299
http://forum.beyond3d.com/showthread.php?p=1724893#post1724893
http://forum.beyond3d.com/showthread.php?p=1724970#post1724970
http://forum.beyond3d.com/showthread.php?p=1725015#post1725015
But you're right, it could be that me, bgassassin, Edge and Kotaku (who were initially skeptical about Edge's report and then changed their mind and reiterated the rumours) were wrong all along.
Well, we don't know who was the Kotaku or Edge source, maybe their sources could be been cheated. Maybe Microsoft can't change the hardware from what we know, but all the things related to software are not set on stone, MS can change things even after launch.
I have read you, and you looks quite confident. You have your sources, and I know you trust them, but you can't be sure if the people taking the decisions, trust it to others. I really doubt all people related to next Xbox know all things.