I've learned to take pretty much all departure time updates, whether by easyupdate, .bomb, etc. with a grain of salt and as guidance only. Ever since my girlfriend nearly missed the last departure of the night that was announced as delyed for 2 hours about 3 hours before scheduled departure, then ended up departing on time. Ironically, of course, usually if I'm sitting at the gate waiting for a flight that is about to be delayed, I know about it from easyupdate before GA's know.
It's a shame that UA even developed a "customer committment" article on sticking with a delayed departure time once announced as customers may leave the gate area. I have seen and heard about more examples then I care to count of this policy being non-existant in practice.