Computerworld just published its in-depth usability test of the Apple iPhone, the HTC Touch running Windows Mobile 6 Professional, and the Nokia N95 running the Symbian operating system. The tests involved a number of participants who had never used any of the three devices, and had measurable results (i.e. the time it took to accomplish various actions). Apple’s famed information architecture and interface design skills seem to have paid off as the iPhone bested it competitors by a factor of two in some of the tests.

The study praises the iPhones information architecture and consistent user experience as a strong benefit to any user be it someone new to the iPhone or a power user. At Gear Live we have noticed several inconsistencies in the user interface, for instance, the new message button being in different locations in the mail and SMS clients for instance. We do however agree with the general consensus of the study that overall the user experience with the iPhone is far more unified that it’s competitors.

Things were not entirely positive for Apple - some users found the lack of tactile feedback a little disorienting, however all users were able to finish each of the tasks with the iPhone. The also iPhone fell behind it’s competitors in the sheer count of features. The N95 managed to edge out the iPhone in this category with GPS, voice activation and the ability to record movies with it’s camera. Considering that the Nokia is $100-300 more expensive in the United States than the iPhone many users have elected to splurge for Apple’s $400 easy to use wonder device.