I doubt this is true, no company would willingly create a shortage on consoles. Nintendo isn't losing money on their consoles but their real money comes from the sale of games and liscensing of games, more Wii's more money. Every coorporation wants more $, trust me.
BTW, that last line, "It's a tad ironic that a major executive of GameStop is making this sort of accusation. As anybody who's ever traded in a game there knows...they're not exactly a shining beacon of morality." that line cracked me up.