FLIGHTONTIME.info - Aer Lingus Flight Delays & Punctuality
Shows LGW - NOC to have an 83% punctuality in 2009, and an average delay of just 11 minutes. Perhaps your friend is just unlucky - remind me not to fly when he does.
By way of comparison, FR to NOC had an ontime of 87%, and an average delay of 7 Minutes, so not much in it.