The iPod touch isn't really important to Apple. The iPod touch is sort of like the step child of the family. The iPhone is more important to Apple, not some product catered to the teenage market.
According to this breakdown of the most recent Apple financial results, 11.6 million iPod Touches were sold in the last three months of 2011 - - that makes approximately 40 million iPod Touches sold in 2011 - a pretty good chunk of sales for "some product catered to the teenage market".