I have a feeling Twitter is like Marmite in that you love it or hate it without a lot in between.... perhaps a few that hate loving it.
The service has been having troubles recently with repeated outtages which in a less addictive service would already see it in many a user's deadpool.
The level of frustration has been high amongst users and among some industry commentators. One example of this was a post on Techcrunch which was a little disdainful and could easily lead to viral panning of the service.
I think the Twitter response was fantastic - playful yet serious, humble yet confident. Well done guys. A wonderful use of your company blog to reassure your users and get people onside again.