I'm analyst as well. Based on extensive surveys, I can safely say the iPhone 5S will be released this summer or autumn. It will have the same or larger screen. The processor and GPU will be faster, battery life will be the same or slightly improved. Camera will be improved as well.
Apple is working hard to incorporate a fingerprint sensor, but it's a lot of work to integrate with iOS 7, so it might be postponed for the iPhone 6 which will be, according to our sources, released in 2014
The iPhone 5S will look the same as the iPhone 5.
Apple is looking to change their naming conventions, but is most likely to call the iPhone 5S... the iPhone 5S or the New iPhone.
Can I have my money now?