Just the view of an EA spokesperson. Single player is still strong. This isn't even the "EA" view of things otherwise why bother putting out Dragons Age, Dead Space, The Simpsons, Orange Box(Only 1 of those games is multi). Some of the biggest games are single still, Oblivion, Fallout 3, Bioware in general, hell Beth went out of their way to get the Fallout license.
Sales of these games counter what he says anyways, people love single player games still. Not about single or multi really, it's about how good the game is.