Ask HN: Will Twitter Drop WikiLeaks?

In the last few days @wikileaks has finally started following one user: TweetBackup.

Considering Amazon, PayPal, EveryDNS, and Tableau Software have terminated services with WikiLeaks, is a similar move by Twitter imminent?

To elevate this question above mere banal 'yes / no' speculation: Twitter has been the poster child for internet freedom of speech and activist movements, for instance during the Iranian elections. As this has become an element of their brand, and at this stage they have less of an economic achilles heel than Amazon et al, is it unlikely they would make a move before any legal decision?

If Twitter did trigger a Terms of Service cancellation of the WikiLeaks account, would this action represent a far larger shift in the internet landscape and mood than any previous action?