Yeah, I've got cable too. Supposedly the highest speed available for home use. I don't know what the heck happens. I'll be going along just fine, then I'll try to load a Guitar Tricks page and the spinning beach ball thing just keeps spinning. I can't switch pages or close the page I'm on. Pressing command-period doesn't stop it. So I'm basically stuck waiting 5 minutes while it does whatever it's doing.
Most times I just get impatient and force quit the browser & restart.