Update from the OP, as I know a few people said this killed their desire to get the Pilot Sport A/S.
After 2500 miles or so, I'm now noticing minimal consumption difference as compared to the OEM tires (although I've been too lazy to take off the aero covers I put on for our road trip so far). I've done several 50-100 mile drives that got me in the .220 - .230 range, and my lifetime consumption is .218. Looks like I just needed to break them in a bit. I probably won't bother paying the $300 difference to swap to the Primacy now.
After 2500 miles or so, I'm now noticing minimal consumption difference as compared to the OEM tires (although I've been too lazy to take off the aero covers I put on for our road trip so far). I've done several 50-100 mile drives that got me in the .220 - .230 range, and my lifetime consumption is .218. Looks like I just needed to break them in a bit. I probably won't bother paying the $300 difference to swap to the Primacy now.