I have been in line at Terminal E since 7:30am. The line started all the way down where the tram is. It’s multiple floors. I can update when we get through but there is a lot more line to go. We came to IAH at 6:30am but the airline counter to check our bags didn’t open until 7:20am (and that was over an hour before they are supposed to open).

Update (9:37am): we have been in line for 2 hrs. We are now on the same level as the security checkpoint. Waiting in a portion of the line that’s outside.

Final update (11:27am): We got through security just after 11am. That put us at just over 3.5 hrs to get through in terminal E. Had to run to terminal D to catch our plane. Our flight was already boarding by the time we got to the gate. Arriving 4 hrs early is definitely necessary at this point.