Of course I want the switch type of the tab panel to be "client" so the content loading can start even before the user opens the panel.
i don't know any component that do that, but it's possible to create one...
more generally it would be usefull to have a <rich:backGroundLoadingPanel> or a new attribute "backGroundLoading" with default 'false'.
with the attribute it's easyer to use on several components like dataTable for exemple.
this would be very cool to improve visual speed of pages and acces to data...
But it seems quite difficult to do. should be a lot of work.