I checked the air pressures, a few PSI high, but nothing major. I wouldn't be surprised if the alignment was the reason it felt heavier, the toe on one wheel was pretty far out.
Just did an hour of highway driving, happy with them so far. Quiet, smooth, and handle well. They are H-Rated, vs the T rating of the Michelins, I think that may help when it's loaded for a camping weekend.