Need help with internet bandwidth calculation?

Hi,

I'm running a Win XP Pro, SP3 box.  I have ADSL internet service.  I'm considering ditching my two A T T telephone lines (voice & DSL) and use local cable company telephone and internet service.

I want to compare my ADSL download speed with what the cable company promises.

1.  When I download a file, Firefox "Downloads" (Ctl, J) consistently runs at 70 to 80 "KB/sec".  I did a small test and downloaded 9.1 Meg in 60 seconds.
2.  On Control Panel, "Network" tab, the speed is shown at "0.06 to "0.07" % with Link Speed 1Gbps.
3. The cable company promises up to  "7 Meg."  They don't tell you Meg/???.  I assume is is  10 Meg/Min.

The image below is two screen shots from the cable company advertising their various internet download speed.

What speed am I likely (ball park, rule of thumb) to experience when it says up to 10Meg?  
What is the approximate download speed difference between ADSL and cable 10Meg cable?  
How do I do the calculation?

Thanks.




Broadband1.jpg