No one knows the exact release date. It is only speculated for an October release, but I got a feeling it will arrive next year. I don't think its wise for Apple to release a 13" retina MBP until they fix the IR issues and improve their quality control for products. Also, I'm pretty certain the iPhone 5 is already delaying them to manufacture enough units for the demand. There are going to be double or triple the amount of sales compared to the 15" since it's going to be more affordable, lighter, and portable.