I agree. It's getting annoying with Wii games around here. Twilight Princess still costs more than any other new Wii game (save for Wii Fit), and that's really keeping a lot of people off it.
It's one of the few things that really annoys me about Nintendo now (although it is a bit stupid that I am).
If they dropped the price for TP from 65 euros (actually, it's more, but it is easier for me this way) to 40-50 euros, that would bump the number of people who buy the game, and probably games in general.
This would long term - make more people play much games
And short term - lead to lower profit pr game, but with more games sold, it (almost) evens out.
Still, I see why Nintendo doesn't do it - they are going to make less money if they do.
http://www.vgchartz.com/games/userreviewdisp.php?id=261
That is VGChartz LONGEST review. And it's NOT Cute Kitten DS