"That said, I'm surprised that a useless social networking company that caters to narcissists..."
Wait, wait, wait a minute. I see this characterization all the time and it's getting tiresome. Yes, there are plenty of narcissists on Twitter. Fine. But there are also plenty of us who like to curate feeds of interesting people and organizations we like to follow. Twitter fills that niche for me, and it's pretty easy to skim past their minimal advertising.
i.e., people making these pointless observations about Twitter are adding nothing of value to the conversation.
I might also add in response to the comment above about no managers being targeted for firing... That may be, but the way I read it, the summary mentions whole departments and I would assume managers would be included in the layoffs.