Edit: Also, the Xbox One is launching tonight so if their Live servers are down...it won't be pretty.
What a bad time for this to happen for Microsoft. It's almost too badly timed for it to be a coincidence, if I were an attacker with access to Microsoft's DNS' this would be the perfect time to launch an attack.
Edit: Also, the Xbox One is launching tonight so if their Live servers are down...it won't be pretty.