VZW is on EV-DO Rev. A which supports 3.1Mb transfer speeds NOT 2-300kbps and is MUCH faster than EDGE. HSDPA actually supports up to 18Mb not the 20 you claim. However as seen below you will never see anything close tot hat in the real world.
Also PC World did a piece in June comparing REAL world transfer speeds (http://www.pcworld.com/zoom?id=167391&page=1&zoomIdx=1)
AT&T averaged: 717 Kb/sec
Sprint averaged: 745 Kb/sec
VZW averaged: 890 Kb/sec
Please get out of here with your misinformation.