iLounge is continuing to test the iPhone 4S ahead of our comprehensive review, but we wanted to bring you some of our initial findings beforehand. We experienced some serious delays trying to activate one of our AT&T units; connecting it to a Mac and trying to activate through iTunes seemed to fix the issue. In testing done at our Buffalo, NY offices, the iPhone 4S shows no noticeable 3G speed difference from the iPhone 4, suggesting that improved…