Almost certainly you didn't run 27.2 miles. Upload the file to garmin connect or strava and take a look at the track. Mine has me swimming through a few of the docks, and the elevation goes up to 200m at canary wharf. I don't remember running up all those stairs before diving off the top!
Blimey some people are sensitive! Maybe he's saying, albeit clumsily as Screamy says, that it's the 'setting and achieving a goal' part makes him think of himself as a runner, rather than 'anyone who can't run 10k in 40 minutes is crap'. He certainly never said that anyone not achieving his goals wasn't a 'true runner' (whatever that means anyway). Just himself.