RodS, if you don't mind please do a trace route to both sites and see if there are connectivity issues along the route.  We've tested the product downloads a few times recently and are getting much faster times from the locations we are testing from.

 

To do this, open a command prompt and type:

tracert www.renderosity.com

 

Hit enter and it should give you a hop report measured in milliseconds.  Post those results back so we can see if there's any obvious issue there.