Wonder how they define performance & features. Both HTC & Samsung have more/better spec.'ed devices.
iPhone has generally been known to make more out of it's hardware than the other manufacturers because iOS has been specifically designed for the hardware.
That said, the Samsungs/HTC's of the world with 1.4/1.5GHz processors probably perform equivalently, if not better, because at some point the processing power will make up for the not as well designed software.
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But it can't make phone calls, and don't forget, it doesn't have the full web!
I don't remember the last time I went to a website that wasn't optimized for the iPhone, or at very least, had an existing app that allowed me to view the site as well, if not better, than a mobile website would have done.
And I've had one dropped call, ever, on my iPhone. And that was standing inside of Grand Central Terminal, one of the most, if not the most, crowded and populated train stations in the world, with thousands of people using the same cellular towers at the exact same time.