baseball : a theory and an observation

Surprise, surprise: we went to a Rangers game last night! We sat on the second level for the first time, which allowed me to make an observation.

The observation: The people who sit in the second deck of The Ballpark at Arlington are far less enthusiastic than anyone else in the stadium. 

The theory, in three parts:

1. The tickets on the lower level are very expensive, so the people who buy them are clearly big baseball fans and are darn sure going to enjoy themselves. 
2. The tickets on the upper level are very inexpensive, so the people who buy them have lots of extra money to spend on beer, hence they are loud and rowdy.  
3. The people on the second level paid a moderately high amount of money for their tickets, and waiters are serving them, so they are confused and think they are at a dinner theater.