I actually doubt it in those two cases. Most religious people believe only because of tradition; they haven't confirmed it for themselves. Many religions convert people with fellowship (i.e. they are converted because they like the new friends they have made) or by using confidence tricks on vulnerable people to tell them what to believe. I doubt there are many that tell prospective converts to go out on their own and ask God and decide for themselves.

At any rate, I believe it worked for me and I believe anyone would come to the same conclusion given enough earnest searching.