I tend to oil the meat rather than the grill and that goes for vegetables as well and I rarely have any problems with sticking foods.
It's very important though to make sure you pre-heat the grill for 10-15 minutes untill it starts to smke a bit (usually due to the remains of the last cook LOL ) and give it a good scrape/brush to get them charred bits off, I usually give my meats & vegies a good spray with an olive oil can all over and just slap em on the grill, No Probs!!
An exception to this would be If I'm using a flat hotplate (griddle) where I would give it a good oiling as most of the foods I'm cooking on a plate would be those which require a shallow fry like potato slices,calomari, oysters, bacon & eggs.
As for Greg Norman, last reports he is coming 2nd as of saturday morning july 19. Yep..another sportsman who has had a midlife crisis. He's already got luxury homes,airplanes, sportscars...etc; all that was missing was THE Younger Woman.Maybe that's why they call him the 'Shark'!! LOL