No surprises really? Sony decided not to respond to the aggressive actions MS were doing so they only have themselves to blame..
Excellent news for MS (and gamers in general) as all consoles sold in November and December are more than the rest of the year combined.
Not sure if it is arrogance on Sony's part to just stand by and watch or whether the genuinely thought they were unstoppable.
if this replicates in Dec, Sony's lead in the US will be largely eradicated