Phil Spencer is puffing his chest out a bit here and really, who can blame him? The Xbox One backwards compatibility program is a great service and sets it apart from the competition.
These numbers are really not all that surprising though, if you think about the all of the Xbox 360s sold (shit-ton) and games purchased (massive shit-ton). Also, I’m sure they have counted folks like me who tried the backwards compatibility once and then never went back to it again.
Still impressive though.