Looks like the other gorilla is stirring a little:

United to Add Duluth, Asheville and Midland/Odessa to Global Network, Boost Flights at Chicago, Denver and Los Angeles Hubs - Yahoo! Finance

Not enough to show it's awake, but enough to show it still cares about Chicago. This dangerous game of tit-for-tat has finally escalated, to the point where 50-seaters are being deployed to Duluth...