I'm new to Wii - as in, less than 2 weeks...
I noticed when playing Baseball in the sports game pack that came with my Wii, that no matter how fast - or slow - I tried to pitch the ball, I couldn't get much variance between about 100-105mph (kph?).
Then I tried "flicking" the remote - whamo - 150+...
Now - as an Aussie, baseball isnt my thing anyway, so maybe its cos I "bowl" (as in cricket) rather than "pitch"... overarm... but that is how the demo said to do it - over your head.
This method has also improved my home runs, and boxing - but how do you feel about it?
Maybe this is a bit too deep and meaningful for a game... :}