My connection is not that great, so I fully expected it to be a little slow. The difference between IE10 and Chrome is huge. IE just froze after the circle thingy within a minute. I left if for about 20 minutes just in case, but it did not change. On Chrome saving was no problem at all, apart from the usual network delay, but it always looked like something was going on. I noticed the program seemed much more robust in the Chrome environment. So I would just say don't use IE with this product, because after all we know Windoze is pretty rotten.
It a fairly specialist product that no everyone will use so rally diehards shouldnt mind using it with other std freeware.
Frankly I wouldn't worry about the gradual save thing and rather work on other stuff.