This is a question I frequently get asked when people find out about GDS and what we're doing. I don't get asked this by government organisations, but other people more generally.
The answer is that I don't know.
I do know that you should have a digital culture that means you have the people with the knowledge and the skills to make that decision and then implement it. Because this isn't about Twitter. Of the web, not on the web.
You can read that blog post again and swap Twitter for any other service, technology, whatever.
You can also read that blog post again and delete digital from the third paragraph.