In the summer of 2010, Mike Hellers and I made a video comparing the speeds on the 4 models of iPhone. We both cut it differently and published it. Here are the videos:

[vimeo http://www.vimeo.com/13612648 w=640&h=360]
and also on YouTube.

[vimeo http://www.vimeo.com/13611265 w=640&h=360]

This video got various write-ups across the web. Some of those are listed here.

Mike's version was so popular that several people copied it, re-uploaded it to YouTube and presented it as their own work, presumably to get Google Ad money.
Mike's iPhone video