I'm italian and I really think we don't use gesture more than other nationalities... truth is there is fascination about this, and americans in particular love the story... still don't get why
I personally put it down to the historical problem of Italians not having an official language until late XIX-century, while being a melting pot of people coming and going from/to the whole of Europe/Africa/Asia for thousands of years. Nonverbal codes were clearly essential, it's not a surprise they're still around.