Being a former KFC cook I would say that the best KFC chicken depends entirely on the mood.
I'd also say that anybody with a few bits of seasoning and a thirst for experimentation can make better chicken than kfc sell.
Original = wet chicken, throw in tub with flour/seasoning, deepfry
Zinger = take pre marinated chicken, throw in tub with flour, throw back into water quickly and then back into flour (thats what gives it that texture).