Tim Cook told the investors that there are a lot of big things coming. People who are unsure about which size they want will wait. Apple is counting on Sept to close off the quarter very strong. By putting off the 5.5 they risk the fence sitters not buying. i don't know which size I want, I'm interested in the 5.5, but concerned that it may be too big. I planned on waiting until I could actually see and hold them to decide which size works for me. I'm sure that there are plenty of others that feel the same way.