I'm sure there was some give-and-take but on the whole what I've seen so far is absolutely par for the course, if you were to look into Facebook, Google, Microsoft and any of the ISPs and email providers you would find the exact same thing.
Both Twitter and the FBI were pretty open about the FBI having limited access to Twitters' firehose and that there was constant interaction between the two parties. You can add to that that if you were to look at this internationally and at the state level that such contacts can be expected to exist as well. Any assumption to the contrary is hopelessly naive.