@DuckyTheDuck: Go I'm wondering why they took the time if 1.5 is going live tomorrow. And did it have to leave map makers unable to publish their maps for 2 days? I hope this is not how blizzard is going to run things from now on. ;-)
What a hypocrites, in the last day they add the path with showing their own maps on top as featured game. While it was clear from the start, that the space there was kept up for something. While didnt they added it before...
I watched my drives during the process and it used 10gb at it's peak of optimizing ... then the patch was 1.2gb download. (The 10gb was copying and pasting or some other form of rearranging because it frees it up after).
The patch requires about 150mb to download to playable ... 1.2gb to be optimal.
Update, it appears quite a few options may get reset so you might need to reconfigure graphics options / mouse speed options etc. My mouse speed was really slow compared to before the patch, which is why I noticed.