I did a quick check last week and didn't see any major difference in the temperature between the front left or right. I'll check it again this evening when I get home though.
I pulled the driver side apart yesterday to check if a caliper piston was sticking, or if there was an issue with the slides. In the process nothing obvious surfaced. What I should have done, when I had things apart, was to measure the pads on both sides. At least I'd know how much the wear difference is.