While I would have preferred it to be spoilered (as in blacked out), it's possible that the Courier simply saw him?
After all, he/she doesn't suffer from amnesia.
Sure. But would the player have known?
When it's been boasted that one has to go find out
who shot you and why, so I'd see it as a bit weird solution to reveal it already before the game is even out (or in the opening sequence of the game, which now seems likely). I'm sure, though, there's a reason for this, but somehow I would've preferred to do the digging my self.
Not a biggie anymore, though.