This trope is just as accurate as the whole "Miami is a dangerous place to send your kid to" trope. If you reeeeaaaallly want it to be true, you'll search high and low to find the slightest example and disregard evidence to the contrary. It's rather self-serving but we all do it. And trust me, Nebraska is a whole different world!
On another note, I have used the term "trope" in this thread more than I've used it in years. I just never thought I'd use it in CIS!