I've sent my RPL in three times now and they are great about getting it done. 3 to 6 weeks has been normal. It used to be $20, but is now $50. I took mine in to my local fly shop (not where I bought the rod originally, but a Sage dealer) and they sent it in and called me when it was back. Great warranty!
P.S.: I now need to send it back again due to a broken tip section, but I've been lazy about it...and, perhaps a little embarrassed to be doing it a fourth time