As you might expect, anyone in the market for an iPhone is leaning towards the latest and greatest. A recent survey conducted by Consumer Intelligence Research Partners shows that 89% of U.S. consumers who bought an iPhone between October 14 (the day the iPhone 4S launched) and December went with the 4S, while 7% picked up an iPhone 4, and 4% bought a 3GS. Of the iPhone 4S buyers, 21% bought the 64 GB model, 34% went with 32 GB, and 45% bought the 16 GB version. The CIRP co-founder, Mike Levin, provided some additional context to the study.