I’ve mentioned this on reddit before. I met him at church when I was little. He came for a baptism of a friends child or grandchild or something and my mom pulled me out of Sunday school to meet him. Looking back, I remember him being very quiet and polite.
I asked him if he was “the real” Mr. Rogers. He responded something like, “well, my heavens I sure hope so!” And I do recall him speaking in his trademark slow speech pattern.