I give them a B-.
I am quite dissappointed in Blizzard's server stability at launch. Now they can suggest that unprecedented demand caused unreasonable stress on servers, but I had expected more.
Blizzard has made a game that PLAYS very very well. I suppose they know as much as the next company when it comes to dealing with MMORPG server demends. Diablo is not a fair comparison since Blizzard.net is really just a matching service, and does not actually perform game calculations (or at least nothing to the scale of a MMORPG.)
The other thing that bothers me is the relative lack of information. Our main server is down, and the only comment is:
Blizzard Community Rep wrote:
We are experiencing high network traffic through our east coast data center. We are working to resolve the issue and will update you further very shortly. We apologize for the delay.
So, I've seen better launches (CoH), and worse launches (too many to name) so overall, I think they rate a B- so far.
EDIT: does
NOT