Over drinks in Soho last week, a couple of friends and I fell into an argument. "Apparently, we're all horribly smug," I announced. One of them, Harry, had organised this morose drinking session to allay fears about losing his City job after Christmas. He raised his eyebrows at me from behind a half-empty pint glass. "It's a survey, you see," I persisted, before making those naff little quote marks with my forefingers. "Young adults like us believe we're more capable than we actually are. Mostly our parents' fault, it turns out."