You have seen s1mple hitting cool AWP flickshots? KennyS hit twice as many flicks every map. He was a very very flashy AWPer. Before AWP was nerfed, kennyS used the AWP almost like how we use scout lol. But kenny was average with all other weapons, unlike ZywOo and s1mple who are good with all weapons.
Also, after AWP was nerfed, kenny was never the same again. s1mple achieved that level of individual dominance with the nerfed AWP. So, I think prime kennyS is slightly overrated, because people take him out of context. There were very few good teams in 2014, the AWP was too OP, and kennyS hit his peak form during that time, for a few months.