It doesnt matter to me. By the time the iPhone 5 is launched one of many things is surely to happen.
1. Many different variants of the GIII will have been introduced
2. Motorola would've launched it's Razr HD
3. People will realize the GIII is a poorly constructed cheap phone
4. Price of the GIII will have dropped
5. HTC launched different models to compete with the iPhone 5 and models recently introduced