57k in 3 days is a nice turn around, next week we should see numbers that are above 60k due to the European release and the word of mouth will quickly spread for this one.
Remember it's a game that's black and white, it's not targeted at the family demographic.
However it does suit the Wii very well, it's had a very good marketing campaign and your average Wii owner finds out about games through word of mouth so I won't bring up reviews even though they've been positive too.
Only games with an install base of fans will pull massive opening numbers. Wii games are more impulse buys also so everybody calm down and realise that Nintendo have disrupted the way games sell, they're more long tailed or 'evergreen' than the PS3 or 360, the Wii needs blockbuster games too though just like any industry whether it be books or movies, you have to have your Star Wars or Harry Potters.. We'll see some of those this year with the likes of Wii Sports Resort etc..
