These numbers are meaningless!!! When the DOT allows weather related delays, certain mechanicals, etc to be counted then I might glance at them. Keep in mind if flight X that departs @ 6AM is late 25 out of 30 days departing SFO due to FOG. But the 5 days there is no early fog the flight leaves right on time, then that flight is considered on time 100% of the time.. How ridiculous........