Nope I dont think so.

Unlikely.

The vgchartz article speculates that it could sell 10 to 12 million copies (physical and digital) by the end of the year. If it can do that, who know how much it'll sell overall given the legs of Blizzard titles?

First week no since it's a PC title. Overall yes. very yes.

It will sell incredible amounts. 

I don't get the point of first week sales records with this game.  Blizzard games are like nintendo titles.  People buy them weeks, months, and years after release because they hear about their quality.  This isn't a front loaded marketing based game.  It is a title that will have big initial sales because of a huge fanbase and continuing success based on the reputation of the game. 

We all know starcraft junkies.  They will buy it first week.  When we break down and buy the game because of their gushing reviews/to play with them (since they stopped playing everything else) the sales will continue heavily. 

Lastly, single player users will wait until they can afford to buy it.  There are many who don't like playing the obsessives online and so they generally can put off the game until they find spare money (opposed to saving money beforehand or foregoing other games/goods/etcetc to purchase it first day).

The one danger is that they royally screw up Starcraft 2.  If Blizzard has become arrogant it's certainly possible.  I can't predict this except noting that it's a danger given the other features they tried to push on the community (real names and xbox live style bnet, wtf guys).