This sounds worse than Diablo 3. I certainly didn't have the issues people are talking about here when I was playing D3. The first couple days were messed up but after that it was smooth sailing other than the odd glitch (certainly not a month or any of the other crazy times people are claiming. A few days at worst for instability and around patches, which also happens in SC2). This case sounds like it is getting worse each day, not better.
Good thing I waited. If I get this game I will get it in like a month. I may not even bother because I will be so wrapped up in the new SC2 expansion.