Bing Uses rel=next and rel=prev For Discovery But Not Merging Pages

With all the controversy around Google just noticing they haven't supported the rel=next/prev and now trying to dig themselves out of a hole - folks are curious how Bing supports it. Frédéric Dubut from Bing said on Twitter that Bing uses them for discovery and understanding site structure but they do not use it to merge pages into a set.