I would be highly surprised if the heater actually comes on. I mean, that would be a total waste of energy, especially with LG being such a hype following brand.
I know 2 situations I feel a slight warmth at the end of a spin cycle.
First is boilwash with a small load (thus, short low level rinses, with our AEG less then 25 minutes and only a drain-rinse-spin-rinse-spin sequence before finish).
Second is either a really well or really badly balanced load after a high speed spin cycle (especialy on the Panasonic after 8min@1400rpm and the AEG after 4min@1600rpm).
With US drums being even bigger, the actual speed the bearings have to move with (and thus the friction) are probably greater.
Further, LG uses pretty thin plastic tubs and metal rotors on their DD motors. These rotors are directly connected to the shaft, spider and drum with only metal parts. And as there is at least some induction effects on stator as well as rotor, some heat will be generated, probably then conducted\radiated onto the drum and into the clothing.