VNC connection to an iMac running Lion from Windows - very slow

Before switching from Snow Leopard to Lion I used Vineserver on my Mac to access it using VNC. VIneserver does not work in Lion, so I decided to try the built-in server (screen sharing)
After multiple atttempts and tweeks I managed to connect to the Mac using TightVNC on my windows machine, however, it is a very slow process. After connecting, I get a strange looking gray screen, with 2 fields asking for my userID and password. The response from the Mac is extremely slow, and sometimes it freezes up all together. If and when I get through that first screen, and I finally see my desktop, things speed up a little, but it doesn't come close the speeds I achieved with Vineserver. The new login screen is what makes it almost not usable though. Does anyone have a similar experience - or a solution?

This issue is caused by a difference in the way Lion handles screen logins.
You must change the way you log in so that the client uses Mac OS X sign, on the Mac OS X user and Mac OS X password and not a VNC password.
On the Lion machine that is acting as the server to remote to, have screen sharing on but untick the two boxes in the Computer Settings area as shown in this screenshot:-
This set up works well with my Lion Mac using Mocha VNC iOS client and gives a very usable response across the internet from my iPhone 4.
Before I made these changes I could barely log in.

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