"If you've got the time and inclination to read a somewhat lengthy article, here are observations on iPhone 4S," states Jim Hamm. He goes on to comment that it's by John Gruber, "a well-known blogger whose perspicacity I admire."
(If you find the white-on-black format hard to read do these keys at the same time: control, option, command and 8. Do the same then to toggle back.)