Well, David F. Watson is an authority on John Wesley and all things Wesleyan. When he writes on Wesley, I read him. His post on Wesley and judgment is spot on. He begins his post,
Lately I've been working on a Wesleyan interpretation of Matthew, so I've been reading a lot of Wesley, particularly his thirteen discourses on the Sermon on the Mount. Going back through his corpus of sermons reminds me what great treasures they are, and how he always attempts to deal with theological issues in a practical and pastoral manner. In his sermon, "Upon our Lord's Sermon on the Mount, Discourse the Tenth," he deals with the issue of judging others, particularly with reference to Matthew 7:1-5.
His reflections on John Wesley and judgment are worth your time. The post is here.