I was on Palm Beach in January and took some pics of the kitesurfers there while testing out a new lens - thought they might be interested in seeing them... they made for some spectacular images!
Pics here: www.flickr.com/photos/furographer/sets/72157649760046020
Cheers!
If anyone was wanting download hi-res versions, you can get them here: www.gettyimages.com.au/photos/kevin-airs?agreements=ed:8617,pa:53321&mediatype=photography&phrase=%22kevin%20airs%22&sort=best
Yes, it was... and the AF is incredible. I think every shot on Palm Beach was pin sharp - the AF is as good as instant. I normally shoot football though (often in very poor lighting) and the AF is virtually impeccable. An amazing lens - $3500-worth but astonishing value compared to $7000 for the 300mm 2.8 Nikon, yet the 2.5x zoom gives you so much more flexibility and it's every bit as sharp.