Using a good adblocker (eg. ABP) and a tracking blocker (eg. ghostery) can make things go much faster.
Of course, it could be something completely different causing your problem.
I suspect it's something else as it happens with web pages where there are no ads too.
Then again, I have just installed AdBlocker and can read the Guardian website which was becoming difficult. (It wasn't loading, I mean, before die-hard Times/Indy readers scoff!)
Bev.