I lived in Chicago from 2006 to 2009 and flew United out of ORD. I now am based in New York, flying Delta from LGA and JFK.
Now, every time I go back to Chicago and fly in and out of O'Hare, it has been a breeze. Yes, traffic from the city out to ORD is the same as it ever was. But the terminals seem less congested (though I only see 1 and 2), I haven't had a significant non-NYC-related delay in years, and it seems I'm always #1-3 for takeoff after a brief taxi.
Is it just me? Has the delay and overcrowding situation really improved? I was flying out of ORD when the new runway 9L opened, but as I recall at the time, it was limited to being used only for poor-weather landings, due to noise complains from Park Ridge. Is it used more generally now and have this and the other runway configuration changes made for an easier go at ORD?