my very simple rule of thumb....

if i get notified via easyupdate or check the bomb for my flight status and i am delayed, i will still arrive at the airport based on the original departure time* as flight times can change (both +/-) for any number of reasons (i.e shows 2 hour departure delay but they swap an a/c to one that's good to go either from a spare (say at sfo) or take an inbound destined for someplace else on its turnaround and use it for my flight)


*and i'm old school that i still allow myself to be at the airport 90 minutes before (but that's just me)