My Trek 2300 came stock with Bontrage Race X Lite tires. I thought....'I'll tear these things up in a week.' Not a single flat in 400 miles....including a 40 mile NYC ride! (went to see Lance race).
Last tires I had were Specialized S Works. $40 each. Great tires performance wise, but got a flat every other ride.....a real flat, not a pinch or spoke flat.
Maybe just bad luck....who knows.