Nintendo's (hard)core games outsell 360s/PS3s

[ramses01]

Here are some definitions that might help

Platformers - casual
Non-sim sports and racing - casual
button mashers (e.g. SSB) - casual
Music games - casual
mini-game collections - casual

RPGs, most FPS, some action, simulations, strategy games, some adventure - non-casual

Using that metric only metroid might be non-casual.

Of course, as has been stated previous, if you look at 3rd parties, the situation looks bleak for the Wii.