internet speed not optimal

hi there, can anyone help me once more, this time my internet connection is working below par and sometimes so slow you have to wait for pages to load.
compared against my windows 7 on and my linux OS 13.1 was constantly half or less than than half as quick than windows’ results on
my network card is controlled by networkmanager and I am assuming it uses ipv6 if it doesnt then that might be the answer to my problems.