I SHOULD BE provisioned for 3000/768. I've checked my Verizon account to make sure that's what I'm being billed for. Based on my sync speeds, it looks like I'm provisioned for something closer to 1500/128, which is almost exactly the throughput I'm seeing on multiple speed test sites.
My machine is clean of virus/spyware, and I'm running my tests clean as well. DNS settings are being assigned by Verizon via DHCP, and shouldn't have an effect on my sync speeds regardless. The results have been consistent over time and on multiple computers.
As you have already figure out looks like you are provisioned incorrectly at 1500/128 rather then 3000/768 (sync 3360/864). I seem to remember 1500/128 was a marketed speed years ago.
Given your margin and attenuation numbers ought to qualify for 3000/768. If for any reason you do not should at least be configured for 1500/384 (sync 1792/448) as JohnA posted. Keep in mind Verizon markets up to 3000/768. If line does not support it will be configured for 1500/384. There is no difference in price.
Next step is to call Verizon and get speed corrected.
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