+3 - I really do prefer UA's groups, especially with the pre-set lineups. It means you can line up early or wait for the call, without (generally) crowding the podium, group everyone in the same line regardless of status, or blocking the exit lane for deplaning. I say generally, as I know it varies per airport, what aircraft is used, etc., but it's a sane order that I prefer.

Also agree with separating out the paying business and SE's who are giving their business to AC, although I may be a little biased.