Time delays between screens;

I have been going slowly crazy with how long it takes between screens (not TOO bad) and after I get up a screen the 'locking' it does to my computer before the orange 'live the school run' banner appears and I can navigate again.
Now between screens can be anything from 3 to 7 seconds, but then I get a frozen screen arrive and I have timed the orange banner taking anything from 11 to 17 seconds to arrive and for my page to become responsive.

That sounds such a little time written down, but sitting for seventeen seconds with a frozen laptop load after load after load is driving me potty.

Now, I don't get it on any other websites, but wondered if something was wrong with my settings, or if anyone else has the same thing going on?