The cap was always there - so I made sure I tested how much it was slowed down - probably slowed 20-40 % before, now(apparently since Jan) it is slowed 99%!
I could live with a slow down but not an effective "shut down" (eg skype doesn't work, I can read 2 pages of paper text while an email - text only- loads, etc). They say it is nationwide but I've read a number of posts complaining that they just did this in the SF bay area and lots of people have the same complaint of it being unusable.