It's all the Adverts. IDG have been trying to monetise the Site and, in my opinion, have allowed too many badly scripted Adverts.
While it will not help IDG's profits I would recommend anyone with a download speed of less that 10Mbps to download Adblock Plus. This link is one for IE - as the BBC says, 'Other flavours are available' from this supplier.
My opinion is the I have no argument with having adverts on the Site, just that they need to be fast to load. However some of the current adverts carry such a load of 'Add-Ons' that they bog the site down to unacceptable loading speeds. In classic terms, Pyrrhus's victories in Southern Italy come to mind.