I am in the process of renewing my IBR with FedLoan servicing. It has been at least a month. I finally got an email saying the are getting a lot of paperwork and it may take 30 more days. They are usually pretty speedy(last year it took less than 2 weeks).
Watch out for ACS. Confirm they actuality got your paperwork. They said they never got mine for 10 months straight. I eventually defaulted. Had to rehab . Now I have a new company and no issues.
Unfortunately, it seems like servicers are kind of backed up on income-driven payment plan processing. I suspect this has something to do with a whole slew of ]borrowers being recently made eligible for REPAYE and wanting to switch. The best thing to do is call in regularly for updates and make sure that you send any additional info they might need quickly.
Just wanted to let you know that they just finished processing my paperwork. Not sure if they did it because I emailed them about it.