I think we could use a subtle spinner in the end of the box. There will always be times when it isn't fast enough and I think it is important to get that visual feedback.
!worddav3b71b169cfd10edaaef2b4ff93ccdb4f.png|height=43,width=345!To make it less jarring and more subtle, maybe the normal spinner could be made a tad lighter and/or smaller.