A FlyerTalk Posting Legend
Join Date: Jul 2002
Location: MCI
Programs: AA Gold 1MM, AS MVP, UA Silver, WN A-List, Marriott LT Titanium, HH Diamond
Posts: 53,002
Not really.
The less-dominant carrier is often friendlier, less crowded, and easier to use. Especially if they're just barely big enough to have a lounge of their own. (AA in DEN is my personal example.)