I think shorter PCBs are not included there because they are the original PCB designed by Nvidia, so it's used by other brands too and its supposed to not be so "faulty". But with the default OC, its heat it's higher than on the original PCB:
Anyway the "Touture Loop" test has not a lot of sense to be considered as it's done under Furmak. Furmark even doesn't use high GPU frequencies, in fact it's downloclock the card. "But, how is it possible to show more heat?" Simply because it's called a PSU virus -> it forces the GPU to over pass the TDP limit of the GPU rising values of 120%. THIS is the cause of those overheat images, and, playing, you won't never pass 116%, and usually nor 105%, as it will use the TDP considering the current frequency, but won't use the TDP as it maximum, all the time and without excuse.
I have decided one thing: I will use and ENJOY my GPU until it dies, and if it "explodes" after 2 years I will RMA it and probably I will get even a better one, instead of worrying now.
Regards!