Spicewood is right on, I'll add that the temp is usually even lower than 80, closer to low 70s.
A fast pool will also have as much saline in the water as is legal to create more buoyancy.
Here's a look at the world record progression in the 100m free:
http://en.wikipedia.org/wiki/World_record_progression_100_metres_freestylerecent years' improvements are really not as drastic as people have been making it seem. Historically the records only stick arround for a couple years, going all the way back to the early 1900's. The drastic drop in recent records is that there are so many events that have had drops rather than re-breaking all the records over and over. That is pretty typical in Olympic years and heightened this year from the LZR and a very talented group.
Remember that in swimming facility improvements have been continuous over the entire century while there's not as much room for improvement for track facilities.
As for the culture? I am a little scared that the swimming community is being naive, but history has shown that in swimming the bad apples get called out and found out very quickly (East German women in 70's, Chinese women in 90's, a few suspicions such as Angel Martino in the 90's). Nobody has been shouting, so we'll see what happens.