Yeah, I got it yesterday as well. Lovely update. The new keyboard replaced Swype for me, just as I thought it couldn't get any better. It feels so ancient to use my iPhone now that I'm used to the Nexus 7... can't wait for N4 restock!
I bought my Nexus a week ago and love it! I've checked for updated daily including today and it doesn't find this update. I don't know why, are they limiting it to certain parts of the country or something?