well jb, a little late for my reply but, for those that don't use an exluder and find the queen laid up in your super, put the excluder on, (make sure your queen isn't up there) and the bees will take care of what brood is up there and revert it to honey storage.
like i said earlier, i don't like queens in my supers, (comb honey frames in there sometimes) so therefore i use excluders. when i place foundation on to be drawn, i won't use one until it is drawn, and i will also feed them 1:1 syrup if need be to get them to draw it. sometimes when that first honey super is drawn, filled and capped, i will also remove the excluder, queens won't cross the honey barrier.
dave you are lucky, bees drawing foundation with an excluder on, had to be earlier in the season and an intense flow? or maybe like you said your bees are special?!............