Analysts at Piper Jaffray, R.W. Baird, and Ticonderoga give their approval to the iPhone 4S,...

|By:, SA News Editor

Analysts at Piper Jaffray, R.W. Baird, and Ticonderoga give their approval to the iPhone 4S, believing the device will keep Apple's (AAPL) smartphone momentum going even if some are underwhelmed. But Henry Blodget is less sanguine, arguing the ~50% of iPhone owners who use an iPhone 4 have little motivation to upgrade.