Given that you shouldn't be presenting queries to users as datasheets, this is really should be a non-starter, no?
The method applies to the active window, so it should work with a query datasheet view. If users move the window, then save, then close, it will open in that new saved position and size, so if that matters, best to stick with MoveSize IMO. Better yet, don't allow users to dabble in table or query datasheets.
The more we hear silence, the more we begin to think about our value in this universe.
Paraphrase of Professor Brian Cox.