OK, look, this is ridiculous...
So the 3DS hasn't had the set-the-world-on-fire, destroy-everything-else launch people thought (and hyped) it would. So what? Even with those numbers mentioned in the article, it's still selling a veritable shitload of consoles. The reason the PSP may be selling more is because its been out for fucking years now, and anyone interested in one can pick one up cheap as chips.
You know what other handheld had a 'dodgy' start? The bloody original DS! It took a couple of years for it to find its feet, establish a good library of games, and then came the ludicrous sales.
This is a weighted article. The author claims in the title that the 3DS isn't selling. Yet, according to the numbers in the article, the 3DS would still have sold just under 300,000 units for May alone. If that's what counts as 'not selling' in the games industry, then the other consoles should look very fucking worried indeed.