The latest patch is sitting and "downloading" but the download always takes 10-15 minutes to start, even if the patch is only a couple megabytes or less. It happened again tonight, a friend of mine was able to start the launcher, patch and play in a matter of seconds. I am still waiting for the same patch to start.
This issue has transcended multiple Windows installations on 2 different computers since the launch of Diablo 3. I would really like some sort of answer one of these days - my internet connection is more than substantial enough to download, and when the download DOES eventually start, goes between 2-4 MB/S. But waiting this long just to start such a small download is getting more and more irritating.