Has Blizzard ever given us a rough estimate of the number of people who have played total since release or the average number of players logged on during the day?

It seems like the only data we currently can use to figure out how many players are playing this game is hotslogs data...which I think leaves out a large number of lower tiered players.

Since last week there has been 11,000 more new battle.net accounts logged by hotslogs in Quick Match though....I wonder what the real figure is.