I assume Steve beat both Randall and I to the upgrade. I suspect Steve has some kind of contract with Apple to be the first person on the planet to upgrade.
But, yea, I probably did.
I got a new 13" MacBook Pro Retina 512 GB last Thursday, and have been busy making it a near clone of my desktop iMac. I'm just not putting the weather stuff on it, movies (hosted on my desktop on Plex so all devices can watch), music (iTunes Match), etc. I'm using Cubby to sync files between them, and doing backups with Time Machine AND Carbon Copy Cloner AND Dropbox. So, yes, I updated three out of four Macs, two iPhones, and two iPads early on the day of release. Wanted to get it before the evening server slowdown.
Anyway, Mac OS X 10.10.5 is working great here with WeatherCat v2.2 build 280