For those of you that are curious.
Bear with me this is on topic ... Since MySims Racing seems to want to update my firmware (I already have Waninkoko's 4.0 + Wiikey), I Brickblocked it, works fine.
I was assuming this game also would want to upgrade, so I brickblocked it as well, tested it without MotionPlus, works fine.
This morning, I went to Wall Mart, bought a Motion plus for $20, then tested with my brickblocked copy and "tada" it works and recognizes the WM+. How do I know you ask ... well, I can plug the WM+ in/out during the tutorial and see feedback on the screen through the club head little display, which does not appear when the WM+ is not connected, using "normal" controls.
So ... long story short, WM+ seems to be controlled through software and not firmware update (contrary to WiiSpeak ... I think).
I will test Virtua Tennis and Grand Slam the same way later.
Also, I must say the game is pretty nice ... I am thinking about returning the WM+ I just bought and just buy the bundle.