Mine does the exact same thing. It seems far more on the right side of the car than the left (drivers side). How I noticed it. I got caught in the start of a little rain on the way home from work. Not a long drive but enough to get the temperature gauge into the dead center position as you too describe. I thought I might as well dry it off as it was just misty but I didn't want to spot up the windows. I wiped it all down and when I got to that portion of the fenders they absolutely were warm to the touch (not extreme but pretty warm and as you say the hood was not. I jjust figured it was the insulation keeps the hood cooler than the fenders.Hey all I just picked up my 2021 TB and am absolutely in love but I have notices the front wings above the wheel arches are getting really hot... as in can’t keep my hand on it hot. Has anyone else experienced this?