hi, it is definetly at your end, my guess is you have a banner intrusion on the computer. this is where it tries to load a thousand ads on every page on some web sites, that have inclusive ads on the site like this one!
to make sure, "while waiting for a page to load" look in the bottom left corner of the screen you will see a little tab " saying waiting for" while several ads load up the more ads the more time it takes to load, some of the recent ones getting on to computers is double click, and DNS unblocker it gets in and is almost impossible to remove without a complete HD wipe and reinstall. to stop it once cleaned set the browser to delete history and third party cookies at the end of the session, and never click anything to do with an ad on the page not even the "no thank you" as to a banner this is a yes please and will automatically circumnavigate any protection you have as it has been given permission to invade your hard drive,