He makes a great point and I will elaborate what I think he/she meant by this.
Xbox crowd (here in the states) is without a doubt the shooter crowd, the gaming demographic that loves their racing, shooting, football, basketball games.
Last gen you can count on X360 to be the vanguard for MP shooters and games of that ilk.
When you think PlayStation you think of all of the above and in addition to that you think of zany, artsy and "different" types of games that totally go against convention and what is tried and true.
Parappa the Rapper on PS1, Frequency on PS2, Rain, Echochrome, The Puppeteer etc are games that most publishers would never greenlight because they don't appeal to the mass market.
Sunset Overdrive is just one such a game and the typical Xbox crowd usually don't buy these types of games. They know what they like and they stick to it
Granted this new IP launched in November of 2014 and couldn't duke it out with the established juggernauts that come out around the holidays. The CoDs and MCCs, Far Crys and Ass Creeds that came out.