Had a layover in DEN last month and walked out there and was surprised to see several F9 birds ground loading. Small crowded gate area, not as nice as 'upstairs'. If you have to make a connection it's quite a hike to the "regular" gates as opposed to just 'strolling across the hall'! I saw some older pax struggling with carry ons and hustling to make it to their gates; down that long hall, up the escalator,etc...