Hanging a lot for me, "b.scorecard.com" the main problem.
Others do it too, like google-analytics and more.
Some updates:
The b.scorecard.com causes a lot of people on many sites problems. You can go to scorecard.com and opt out, you can manually delete the cookie (did both, still hung).
What finally helped with that site and others was to add the blocker add-on for the browser.
It creates some headache blocking sites you want you have to manually add as ok, but it sure helped here and other sites.
Now on anandtech the addon has things like 'fmpub.net blocked', which is good because that's one of the sites that hung here.