Launch time has an effect, but it's not a drastic factor in determining the success of a console.
Factors like price, games, features, brand name, etc are a lot more important than launch price. These are all the factors that attribute to the 3DS's current lead over the Vita. Launch time may have contribute a bit to 3DS's current high sales compared to the Vita, but to imply that it was drasticly important is silly. Though trying to deem that a lead over a console out for only one region as significant is silly in it's own right.







