If you scroll all the way down to the bottom of the news page at GameSpot, there's a chart with a list of the top-selling games for last week. I'm making you look at this because under the 'US Console Sales' category, one can plainly see that the Explicated Semaphore Psychonauts is charted at #10 for the week of April 18th through April 24th. Hooray! These statistics are based on sales at EBGames.com, but hopefully this is is a sign of good things for Raz and co. across the board.
In a somewhat related story, it appears that the PC version of Psychonauts is finally shipping, for real.
Source: Idle Forums