The Xbox version isn't Condition Zero, it's just an updated port of the origional CS with new maps and graphics. It doesn't have the single-player campeign of Condition Zero.
Though I don't think the PC version is out. But they've had the pre-order boxes for the PC version of CS:CZ out for some time now. At least the full game isn't out in in America, but I guess it could be out in Europe or something like that. Not including China, where almost everything is out "early"
But maybe he's a magazine editor who got a full version of the game