My thought process on moving it revolved around the idea that a user would be reading about data retrieval and this was the best place to put something in about the custom finders because it was likely to be read by the user, and applicable to what the user was reading about if they were in the part of the manual discussing data retrieval.  The idea was, "Oh you were wanting to get data, look what else you can do to make it even easier".  Honestly I am fine with it either way, it just felt like it flowed better from a user's perspective to do it this way.