You may want to try doing a trace route...which shows you how fast your connections are between you and the S3 server for downloads that we us.

To do a trace route: right click on the start button and choose..... command prompt Type in Tracert renderosity.com THEN wait

Then send those results to store@renderosity.com for us to look at please? And tell us your location if you would? That helps us look at how those connections are working.