Yes, I have had AT & T unlimited for years and recently received a notice of strangulation on my phone plan, too. I have waited to hear even on my iPad plan, which is an unlimited account of acquired rights, but have not heard. I am beyond 9GBs reason to travel this month and have not noticed any slowdown still on iPad. Perhaps we will tell the next month.How move you and watch many movies at the same time? 
In General, I think that strangulation announcements are intended more as a means of deterrence that political forced. Carriers are under intense pressure to demand due to the explosion of smartphones and now tablets (where media consumption is still higher than on phones). The effort involved in the identification of users of heavy combined with slow their use is important, especially since the problem is specific to the cell site. If carriers can discourage excessive use in all they will have accomplished their goal: reducing demand on heavily used sites.
This is not to say that individual users not be targeted. But the overall effort is designed to allow carriers to charge on the basis of the use and long term to eliminate any form of data plans "unlimited".
Sprint has made a few hay by their policy "will continue" advertising. But if it works well enough to prevent the bleeding customers Sprint, you can bet that they move to the same approach used by the two carriers.
