I overstated - it was actually around 10GB in total. Just before the first 5.6GB download was complete, something went wrong, it reset and I had to do it all over again. Not too happy about that.
And yes, updates are better than being stuck with a buggy disc. My complaint is that 5.6GB is a LOT of updating. And more important than the complaint was the question whether or not it was actually necessary, or if something wasn't working correctly with the disc install.
