I don't think so. Here's why:
-November X1 had the advantage of a price cut + COD Bundle + Unity Bundle + Halo MCC release + Black Friday.
Obviously December still has the same price and similar promotions and all the same bundles but it doesn't have the same momentum and the PS4 now has some more competitive prices to boot.
TLTR: XB1 had a holiday headstart in November. December is more of an equal playing field with PS4 now also having the holiday boost.







