can anyone clarify the difference between what I've been told are 3 options for a 4.8i with sport package (thus with adaptive drive):

1. Regular mode
2. "sport mode" - when you put shifter to left position, but do not manually shift it (just slap it to the left and leave it alone)
3. the "Sport" button....

I was told the sport button allows extra air into the engine for increased performance, but have not been able to find any documentation to say what exactly it is for..