I really like Telerik's Silverlight 2 control suite but I'm wondering (and I'm sure my clients will be asking) about size/performance issues. Perhaps someone could answer some questions?
When a browser views a Silverlight app built with Telerik controls, I know it downloads the .xap file containing Telerik DLLS (like Telerik.Windows.Controls.Input.dll). Higher-end controls add desirable features, but how much do they increase the total payload and responsiveness?
To what extent are the Telerik controls cached on the client? When the browser visits again, are these re-downloaded? Is there a way of reducing the overhead of third-party controls?
In the old days of Com, once a control was installed, it stayed on the machine until a new version was installed. I'm not sure that Silverlight 2 works that efficiently.