I just replaced my 3GS with an iPhone 4 (wanted to get in before the case program ended) and I'm seeing a substantial speed difference over 3G. Any one else? Best on 3GS (in 10 months including a month with out DSL! (I checked alot!)) DL: 1487 Kbps UL: 354 Kbps Best on iPhone 4 (in 24 hours): DL: 4215 Kbps UL: 720 Kbps Plus I've never seen my download speed go under 2 Mbps on my iPhone 4. Even at highway speeds I can watch Bolt on netflix. I was so surprised I even reran the test on my wife's 3GS with the same results. PS: I'm in Denver.