Ok, I took some photos of Tony Hawk. All of these images are with the Wii set at 480p and 16:9. The only thing I am doing is changing my TV setting from 'standard' to 'fill'. The 'standard' images change the image to 4:3 and 'fill' stretches it to 16:9. I use the 'fill' setting for all my games and in the Wii channel menu and everything looks as it should except for Tony Hawk. Tony Hawk is not 16:9.
Here is the character select screen in both 4:3 and 16:9. Tony Hawk's character model is all stretched when it is in 16:9:


Here is the game in both 4:3 and 16:9. Note how the cross is all stretched on the right where the turbo meter is. The cross behind the skull should be as wide as it is tall. In 16:9 mode it is not. It is all stretched out.



And, here's the clincher! When you hit the 'home' button on the Wiimote you are greeted with a TOTALLY stretched and unnatural looking dialogue box when the TV is set in 'fill' mode. By switching the TV to 'standard' 4:3 mode it looks perfect and how it is supposed to look and does look in the other 16:9 games (Excite Truck, Zelda, etc.)


And, further evidence....
Watch this developer video of the game:
http://www.youtube.com/watch?v=SSY4L_Irt_0
The game is 4:3 and the cross behind the skull on the turbo meter on the right is perfectly square. It is as tall as it is wide.
TONY HAWK IS NOT 16:9!!!