9to5 mac is reporting this. They also say that we could see both a new ipad mini 2nd gen without retina and 3rd one later with retina. That would be kind of dumb I think...but on the other hand Apple will sell them no matter what. 
http://9to5mac.com/2013/03/04/new-i...-5s-with-better-camera-faster-chip-in-august/
http://9to5mac.com/2013/03/04/new-i...-5s-with-better-camera-faster-chip-in-august/