I would love to hear Abdiel's take on the XB1 get a free game promotion
On amazon here's what the week for that promotion looked like [ran from Sept. 7th to the 13th]
http://www.amazon.com/gp/bestsellers/2014-09-08/videogames/?tag=viglink20241-20#1
#6 - PS4 Destiny Bundle
#15 - Standard PS4
#17 - Kinectless XB1
and remember that pre-orders for consoles count towards the month pre-ordered in, not the month of release so all PS4 Destiny Bundles pre-ordered prior to this particular week in September aren't counted.
Amazon's XB1 offer was also somewhat more compelling than other retailers as they included Destiny in theirs where many other retailers did not.
And sure Amazon isn't some perfect measure of the market but I just don't see any behavior indicative of a trouncing of the PS4 in September by the XB1 as Pachter predicts