A friend of mine went to the Apple Store to test drive the new 4S before preordering today and she said she couldn't tell a difference between the 4S and the 4. She knew they looked identical but she said speed wise there wasn't much difference. She said she only played with it for a couple minutes, but the conclusion she came to was that it wasn't very different. Does the Apple Store even have the 4S on the floor yet? Has anyone else played with the 4S at the Apple Store?