Pl help me with this question?

[PINNI, BALANAND (SBCSI)]

This is my question.
when TSM RUns it gives out summary at end i.e network xfer rate.
Does this depend on quantity of data being sent or its ir respective of data
being sent across pipeline.
Because I see it speed is proportional to quantity of data being sent but
as per summary and  as per my thought  goes it should be independent.
I am confused pl help. Is is not the physical xfer rate of data across the
network.