[Maceman]

The use of gadgets such as mobile phones and GameBoys has caused a physical mutation in young people's hands, according to a British Sunday newspaper.

I doubt this is a true physical mutation. I'm guessing that if all the game boys disappeared, the offspring off these kids would not show this manifestation.

Anyone can see that years of repeated physical motion will rewire the brain -- otherwise there would be no musicians. But that is not a mutation.

[Amore]

You're right, it's not a "mutation." It's simply a case of increased dexterity, brought on by frequent use of the thumb. Still, the phenomenon IS interesting.