Has it actually been confirmed that there is no IS? I take what I read on CR with a stiff pinch of salt.
Nothing is confirmed, and I agree that taking stuff from CR lightly is a good idea. That said the photo does seem legit and in line with recent Canon lens releases. While there is no way to verify whether or not it has IS, it would be a departure for Canon to add IS to the lens and not mark it somewhere on the barrel.
But it's best to wait until they actually release the lens before the angry mobs start rioting. Might be too late for that though.