That should not even equate to a noticeable difference.
For comparison here's mine.
Mine comes out to around 4megabytes/second
Your highest one would come to about 79.36 kilobytes/second
and the slower would be 66.56 kilobytes/second
I could attribute that minor a difference to the different connection type and the speed/age differences of the two computers involved.
When that p3 was new 66 kilobyte/second internet was practically unheard of.
Keep in mind these tests all measure in bits, not bytes and there is a huge difference between the two.