Well that looks like a classic example of journalistic assumptions and estimates that are totally unfounded on a trustworthy source. Anyone can make a statement like that, unnamed resource, all stories refer to the same blog which has got an unnamed source etc....I think it is shocking behaviour from a journalistic perspective....
Also having experienced the iPhone now for a week and a bit and done a lot of surfing, don't wait for 3G...I've had 3G on my Nokia E65/N95 and my Motorola A1000 and in day to day use on the phone it is not noticeably faster at all....Also take a look on youtube and you see it confirmed by people with a stopwatch

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