first off ... having 1gb lan dose not make your internet fast ... thats your internal network speed
when the "speed hack" was detected the ping shot up ... showing that some thing or some one was using internet bandwidth at that point in time (loading a webpage, windows updates, blah, blah, blah)
it seems to me that your internet got saturated at that point in time ... see what sort of ping and speeds you have to a server in France / Gernamy from http://www.speedtest.net/ as speeds tend to diminish over distance.
im in the uk and when connecting to the west coast USA i get this
and this is what i get inside the uk