I see there is interest in this observation so I used a little ruby (.to_s(2)[-22..-17].to_i(2)) to get the datacenter id.

Then ran it on a few Twitter accounts: https://pastebin.com/w8Dnj5kM

It does work, and it's going to be hard to patch

edit: I realized you don't only get one location but the whole location history of a Twitter user. Also locating Twitter's data centers as it doesn't seem to be public information