I've been flying SEA/GRR, routing through ORD, a couple times a year for a few years. My AS and AA gates have both always been just steps away from the AC in G. I'm flying the return route next weekend, 15 OCT, and reckon I'll now have to get from near the AC lounge in G to gate E15 or E17. I'll try to remember to track the distance I walk from point to point and report back here. And maybe add it as a new route in AllTrails.