Food options at MSP are wonderful and they do not rip you off.
It could be sampling bias since this is a Travel and Leisure magazine poll and PIT isn't a popular travel destination.
FWIW, I'd also rank Salt Lake City pretty high-- great wireless connections and even the TSA agents aren't as surly as what you get in other airports. Food is a little pricey, though, but not the abject rip-off you get in a lot of airports.