What was it?
Didnt notice it starting, cant say how long it took

I just happened to be looking at my steam client after reading your thread and saw the download begin and end.

Took all of 2 seconds at ~550kb/s.

Can't imagine it was anything substantial =P

Probably a small fix or something, then. Though I cant imagine why they did it now and dont just include it when they make the game playable.

2.8Megabytes downloaded.

Wonder what that was, pretty small for day 1 patch LOL.