According to this, Blizzard creative boss Chris Metzen has said StarCraft II "feels like the best work we've ever done".
He added: "It's been very, very rewarding to see this thing take shape. Just getting back to that Blizzard of yesteryear where it's not all about WoW - don't get me wrong, I love WoW! But we're so much more than that."
These quotes are taken from a Blizzard podcast. Get it here.