It sounds like you are not logged in. The server and connection has never been even nearly stretched since we moved into it last spring. Even at peak times we have only used about 20% of the server and connection's potential.
Please make sure you are logged in - you will see 'Members area' in top left of pages. there can be many reasons for slow connections and the best way is to try a tracert.
(Windows - Start - Run - type 'tracert
http://www.simviation.com' (without the quotes) )
If you still have a problem you can try clearing temp internet files/cache (cCleaner is a good utility)
Simplicity is the ultimate sophistication. – Leonardo da Vinci