That's not really a valid way to look at things. The DS was $130 or less for most of its life cycle so of course most sales came from lower priced models. People said the same with the PS3 ("PS2 sold 70% of its sales at $199 or lower, therefor the PS3 is going to sell 120m units lifetime"). That's mixing cause and consequence to some extend.
Edit: After reading your answer to Kowenicki - of course you are right the lower price point will help the 3DS. Nintendo handhelds in general need low price points to attract consumers. Nintendo *is* big among kids and teenagers and those have less disposable income and thus want low price handhelds. Don't know why people make fun of this.







