Bitcoin is a community thing, so you will find that different community channels and websites related to Bitcoin are run by different individuals/admins.
There is this Twitter account -
https://twitter.com/Bitcoin, But I think it's under the control of the same person behind
https://bitcoin.orgsatoshi as the person/group care(s) about privacy and anonymity obviously don't want to disclose real identities with social media platforms. Twitter and Facebook are not platforms for privacy or anonymity from the reasons they were born.
I can not skip the twitter account of the forum, the official one. The quoted post is the confirmation of theymos on that account with inquiries from community about it legitimacy.
Twitter @bitcointalk is official, but I only use it for outage notices and such. If there are no problems, then there will be no @bitcointalk messages.
I don't use social media. If you think that some social media functionality would be useful (such as pointing to interesting posts), feel free to do it yourself. If it's an interesting project, I might be willing to create APIs to help you. But since I don't use these sites, I don't even know what people would want.