Even without Global Entry, ORD is one of the best and fastest ports of entry into the US. The average wait time before clearing immigration is on the order of less than 15 minutes at most times, which means that by the time you walk over to the carousel your luggage is just about to arrive. The worst-case scenario used to be an arrival time coinciding with the Air India flight from Delhi or the LOT flights from Warsaw, however that's not been an issue for a while, since US citizens and ESTA passport holders are now grouped in the same separate queue, and neither India nor Poland are ESTA countries.