A 12MB file averaged around 400Kbps from 4 sources.
(That's with a so-called ADSL 128/512.)
And remember I am on a rather loony island with huge numbers of people connected and only really one way in and out !
(And that is under water !)
And, a great big TA to you for at that moment something rather desirable was on page 1 !!!!!!!
For testing connections, believe it or not, I almost always use
PC Pitstop
Which again just happens to be in my sig...
But, for MAC users ???