Alacrity

Standard procedure or freakishly friendly midwesterners?
I went to Buckle for the first time today (apparently, they're all over- including the ATL, but not at my malls). It was cool, and I got a neat jacket, but the sales people kind of freaked me out. The minute I walked in, one of the sales guys complimented my shirt -- because he had one too (a Walmart-bought Wonder Bread shirt-- go figure). Then I picked up the jacket, and another sales guy brought over a sweater which he thought I might like since I liked the jacket. Then a sales girl said that she had bought the same jacket, and paired it with pink and it was cute. Then when I got a fitting room, the sales guy got my name and proceeded to address me by name the whole time I was in the store, and suggest stuff and point out sales.
So, are they working on commission, really motivated sales people, or just freakishly, midwestern nice? The Iowans freak me out sometimes with the niceness, but I don't want to assume.