I was waiting for an X11 in Cramlington towards town today, and on the map it was 10 minutes or so away. Happened to look up as an X10 (running a couple of minutes behind schedule) came off the roundabout. Jumped up and got on it but it's an example of the reliance put on live tracking by many members of the public, myself included, versus the scheduled service. The bus in question, 7621, has not tracked on Bustimes for nearly a week.