Looking back over the past generation or even looking at the GBA 3DS hardware sales are terrible in the US right now. Even with Animal Crossing giving its boost in June it will look mediocre in comparison. 3DS needs a price drop and new bundles. Just throw in Nintendogs, Steel Diver, and Pilotwings all free digitally and price the OG and 129 and I bet it would sell decently. Nintendo needs to learn about the current valuation of at least some of there games is not nearly as large as they think
As for Vita, even if Gamestop carries a couple under the floorboards , it's about as irrelevant to the market as some random android smartphone at this point.