Is it normal for the rear disks to be hotter than the fronts after normal driving? (03 F-150 SCrew FX4)

I bought one of those infrared thermometers for my trailer hub bearings (more accurate than checking them by feel) and decided to check my brakes for $^!#$ and giggles and found the rear brakes hotter than the front bby about 50 degress. I got the same results 2 days in a row. I thought the front brakes did 60% of the work, so shouldn't they be hotter? Is it because the rear disks are solid and the fronts have the vent fins around the outside?

 

Your e brake could be partially engaged and seized, most likely the cause.

 

X2 on the ebrake. Check it out could be engaged.

 

How would I check that?