In the USA possibly yes. But in the UK it only gave 3DS a 57% boost, which is not much for a hardware refresh in the grand scheme of things. And if that lead to a selling out in the UK then that would mean undersupply, which would probably mean selling better than expected, but in this case better than expected would not necessarily mean selling very well in an absolute sense.
I'm sure Nintendo through it supplied the USA adequately for projected demand. As USA is a reasonably strong country for 3DS I would think the supply into the USA would be good enough that a nation-wide sell out means very good sales.
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