Kenneth, we haven't received a project from Satyadev and we were not able to reproduce the problem. If you have such project, please send it to us so we could check it on our side.
Knut, I suggest to make sure that you are using a recent version of the control. We have made many improvements that help to show the decorated controls as fast as possible. Of course if we are talking about a heavy page with a lot of controls that must be decorated, some small delay is expected because the decoration is done on the client.
the Telerik team