From what we read in the Rule book last night that is incorrect. It should be 3pts. I don't have the exact rule cite but I believe that in the scoring section is where this looks like it should be 3pts.

The rule says if a tap, tip, try or "thrown" ball from behind the arc goes in the basket without being touched by a teammate, referee, etc..( I forget the actually wording but it doesn't include the defender) team A should be credited with 3pts.

This, I believe was the rule change a couple of years ago that deals with an alley-oop pass entering the basket withour being touched.

I would have agreed with you that it should be 2pts and 2pts will be the easiest to sell to both coaches but reading the rule it sounds like it should be 3pts.