More to the point, it is an utterly nonsensical claimso nonsensical, in fact, that it is doubtful that those who make it can truly be considered atheists in any coherent sense.
I wouldn't call the philosophy nonsense, but I would agree that in order to be classified as an atheist one has to have a deeper philosophy than simply I believe neither in God nor in the fairies at the bottom of my garden or Everyone today is a disbeliever in Thor or Zeus, but we simply believe in one god less!
Chance as a real force is a myth. It has no basis in reality and no place in scientific inquiry. For science and philosophy to continue to advance in knowledge, chance must be demythologized once and for all. —RC Sproul
"A lie can travel half way around the world while the truth is putting on its shoes." —Mark Twain "
~"If that's not sufficient for you go soak your head."~Faith
"as long as chance rules, God is an anachronism."~Arthur Koestler