Except the rule DOESN'T state that it counts as one unit, it says shots are resolved as if it were - I know the BOLS article had a long comments section debating the semantics, which frankly I quit reading soon in. I need to check the BRB to see what it says about shooting resolution though, as I could be totally wrong.
I get that this supposedly comes via a GW rules guy, but from past rulings like these (via email), it seems they are notoriously inconsistent in responses thru CS.