Board Thread:Naruto Discussions/@comment-25531508-20140923043228/@comment-4728499-20140925223932

Dan was Tsunade's age so he would've been a kid when Hashirama died, he's not the best judge of who's stronger, if Danzo or one of the others who were from Hiruzen's generation said that Hashirama was the strongest, it would be more convincing.