Keep in mind that 2xMSAA is hardly perfect due to the limited sampling positions. One particular angle will get the AA, and another won't.
Oh, I am quite aware that 2xMSAA isn't perfect. Like I said, I can spot the aliasing in the game. But try to reconsile that with the IGN comments like "serious jaggies". Based on their general comment pattern on aliasing (not really a huge deal to them), the comment stands out. So my guess is he isn't running over component but is using VGA, which explains his comments.