I've been trying to sort this out in my head and it's bugging me. It's a question of relating hydrometer readings to the sweetness of the product. I know beginning and ending readings will give a fairly accurate idea of the alcohol content, but I don't see how the final reading can really tell you anything about the taste of the mead, except for it's viscosity. Well, maybe it would be a good indicator in a show mead, but as soon as you add fruit, spices, or malt the added solids will increase the reading without effecting the sweetness, although some additions will also add sweetness. Of course, such additions will also effect the original reading making the must look sweeter than it possiblely should be. I know this doesn't really constitute a problem, but It's been my experience that some people don't take this sort of thing into account when judging a recipe.