Microsoft's version of Office for iPad has apparently been a rousing success. So much so, that the company's taken to Twitter to boast that the productivity suite has topped 12 million downloads. In a week. As the Seattle Times points out, though, Redmond hasn't said how many Office 365 subscriptions (which are required to create and edit documents) have been sold alongside the free, document-view-only downloads. We reached out to Microsoft for clarification, and, well, weren't given much. A spokesperson told us that the company is extremely pleased with the interest that Office has gotten so far, but that it has no additional details to share. So, there's that.