OtterBox has reportedly produced 3 million cases in an initial run for an 'iPhone 4S', reports ChronicWire.
Otterbox produces 3,000,000 cases in initial run for device designated "iPhone 4S"
Photos of the packaging for the case can be seen below. Notice the new 'soft-looking volume buttons' on right side of the phone.
New soft-looking volume buttons being on right side of iPhone 4S can probably be attributed to the "volume button to take pic" iOS5 feature.