Everybody's Talking About Jamie has just celebrated its 2nd birthday in the West End, a joyous musical about a British teenager embracing and asserting his gay drag identity at a Sheffield school at which he defiantly and unapologetically decides to go to his end of year prom in a dress. But now everybody will also be talking about Evan Hansen, another teenager at the centre of a musical, but this one's American and far more emotionally insecure.If Jamie, as both a show and a character, has a...