i do not use the verizon EV-DO service myself. i am just trying to help based on some publicly available information. as i understand it the upload speeds are considerably slower but i do not know the specifics off the top of my head.
"Although Verizon advertises typical throughput of 300 Kbps and 500 Kbps, I saw average downstream throughput of almost 600 Kbps, though upstream performance was only about 40 Kbps. Latency averaged less than 200 ms."
reply to usa2k ping time to google is between 70-110ms when connected to the "broadbandaccess" network vs. the "nationalaccess" network which is 200-400ms. This is at full signal with my magnetic mount antenna jacked directly into the aircard. I have seen speeds upwards of 1.5mbit and I am not REAL close to the tower.