My late twenties have felt like a series of slow-motion epiphanies, each one sneaking up before slapping me in my newly acquired jowls. Everything I said I'd do 'by the time I'm thirty' as a glassy-eyed graduate is now in the 'by the time I'm forty' box. Much has been made of delayed adulthood of Gen Y'ers - that they flit from job to job and take their sweet time earning the traditional adult badges: marriage, children, a mortgage. But...