Oh c'mon, just admit it -- you rationalized that Wii Fit purchase like so: "Oh, I can't afford this, but it's totally something to make me exercise! So, I'll buy it!" Fast forward two months later, and you're struggling to find space to hide the case. All kidding aside (sort of...), you can't deny the facts, and the facts are that the Big N managed to ship 15 million Wii Fits units in just 13 months. For comparison, it took right around 2.5 years to move 50 million Wii units, so it seems this here title is well on its way to hitting the same milestone in around the same amount of time. Unfortunately, you can't lose weight by simply handing over wads of cash to Satoru Iwata -- feel free to try, though.