Question regarding aptitude package repository speed

What is the typical/expected download speed from 
`http://packages.ntop.org/apt/`?

It seems to be averaging around 10 kB/s as of late, which makes the 
upgrade times for nBox pretty crazy. It also seems to just timeout 
fairly often, stopping the upgrades altogether.

This is across multiple systems, and I haven't seen this issue happen 
with packages from other mirrors. I'm just trying to better understand 
the expectation for the ntop suite of software.

-- 
Thank you,
Chris A. Evans