I think you are mistaken on that. IRRC, Rev has defended LS in the previous threads on the topic.His methods are not Biblical ones. When I said good methods I was talking about lets say using a John MacArthur or a John Piper method verse a Ray Comfort method. These methods are Biblical methods. Mitchell's methods are "easy-believism" in nature and he is a proponent of "cheap grace." Mitchell would be for alter calls and the sinners prayer of which I am against. If I am understanding him correctly.
Mac's Gospel Tract and evangelism book differs from that of Comfort in that Mac does not use the 10 Commandments.
Piper's gospel tract and books are different than Mac's & Comfort but he does advocate Biblical methods.
That being said I do agree that there is a difference in you saying WOTM is not the only method God can use, and Rev saying that "one method is as good as another (implying that all are equally useful).