I haven't interacted with Marion, but I have read many of her replies to G2G questions. She has impressed me with her thoughtful (and kind, when needed) answers and suggestions, whether to point a new wikitreer to a solution, or to provide answers or advice to a complicated problem. Way to go, Marion!
P.S. And by chance, the very next G2G post I happened to open had a starred answer providing a location for data that solved the poster's question. The answer was by...drum roll...Marion Poole!