Board Thread:Questions and Answers/@comment-1038387-20140227111018/@comment-1038387-20140310234427

On Earth-16, there's no speed force. Barry is the quickest because he replicated the accident that gave Jay his powers under laboratory conditions. Bart is the second, whose powers were passed down to him. Then comes Jay, who's slowed down a bit by age, and Wally is slowest of all because rather than laboratory conditions and actual chemicals, he used the garage, a chemistry set, and probably unrefined/homemade versions of the chemicals.