This test compares the iPhone4S on all 3 networks on AT&T, Verizon and Sprint... with AT&T and Verizon pretty much head to head, while Sprint lags behind them.
The only advantage AT&T has (and is the only network), is the ability to make calls and surf the web (or other things) on your phone at the same time. This function is not available on Verizon or Sprint.
Regardless of what network you choose, you will always gain one thing from one network and also lose what you once had with another. For example...
1. Unlimited Data (only for those that are grandfathered from their previous plan)
2. Dual function with iPhone (the ability to make calls and surf the web at the same time)
Loss: No Unlimited Data
Gain: No to fewer dropped calls
1. No Unlimited Data
2. Most expensive of the 3 networks
1. Unlimited Data
2. More affordable than AT&T and Verizon
Loss: Slower of the 3 Networks
Those are just a few examples, but most importantly, also depends on where you live. All States differ so any of these networks will vary and will be better or worse depending on your area. So for those complaining, keep in mind the problems you are experiencing is within your area and not the fault of the entire network as a whole. While you may have problems, someone else may have a better experience with your same network.
Speed is dependent upon the network in the area where the test are done. I find it really strange that the AT&T device isn't kicking the Verizon devices butt in download speed, but with no knowledge of whether it's connecting to 3G, HSPA or HSPA+ networks, it's just questionable.
The comments on the youtube link also back up my statements, so I'm not just blasting the test... it's questionable. The editing makes it look even more iffy.