Apple released iOS 5 to the masses yesterday and if you're curious how the update performs on an iPhone 4 compared to an iPhone 4 still running iOS 4.3.5, then here's a video that does a side-by-side speed test. Not only does the video compare two iPhone 4 devices running different iOS versions, it also includes the iPhone 3G running iOS 4.2 and the iPhone 3GS running iOS 4.3.
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