It’s time for Piper Jaffray’s Gene Munster to break the news on Apple‘s dominance of the market once again, this time showing a report of 7,700 teenagers in the USA working with the iPhone in massive amounts. The survey showed that this most recent period of study showed iPhone use up 6% over the last time it was conducted, that being 6 months ago. At the moment, it appears that a whopping 40% of teens in the USA own at least one iPhone.