Displaying Sharepoint objects in PropertyGrid - low performance

Hi,

I would like to know if theres a better way to load sharepoint objects like SPFarm, SPWebApplication, SPSite, SPWeb e.g. into Windows Forms PropertyGrid. Im askin because simple assign:

propertyGrid.SelectedObject= e.Node.Tag;

(where Tag is my sharepoint object and e is a TreeNode)

...takes around 5-10 seconds until PropertyGrid processing is completed :O

I've already tried a few samples with assigning other objects to PropertyGrid and they're all really fast :/