Biggest problem with most evaluations is that they don't test across the country with thousands of users. Dslreports.com has a great archive of users across the country. Looks like Sprint leads for cellphones today..
Samples Down Upload 113 747 369 Sprint Mobile Broadband: 105 727 353 Verizon Wireless 28 622 374 Cingular: US mobile provider (ATT)
These results change all the time though and some are 2g results. No provider consistently leads and all are sometimes on top. Wireless data is fickle.
reply to xenophon I do agree that the sampling of 4 carriers through in one location (at a specific time?) is not a real scientific basis - especially for wireless.
Take what they have performed - hit at least 20 cities Run a series of different speed tests (similar to what they have done) Run them at different times during the day and evening Run them in different parts of the city
Also for 'grins' run take a sample is a rural area outside of the city (farmland, etc) where there's a possibility of no users. -- Canada = Hollywood North