Not hard to understand or believe. That's what I said had happened to us out if IAH. original reason for delay was "waiting for crew". Crew showed up over 1 hour late at which time we boarded only to sit for another 40 min due to "FLO control". Captain said even had the crew been in time, we still had a wheels up which was 1hr 50 min late. UA changed reason for delay from "CREW" to "WX" picking the best one for them to blame. All the other flights from IAH-LGA were delayed between 1-2 hours that afternoon so I believe there was the underlying problem of ATC or WX or whatever you want to call "FLO CINTROL".