Not gonna reply to the queue times question.
However if you want to alt tab, you can try to play in windowed mode with this
http://forums.steampowered.com/forums/s ... p=30525996But i find it strange that in fullscreen (which i only used, like twice in panzar), you can't alt tab without canceling queue
maybe try CTRL ATL DEL, open task manager, you will maybe reach desktop without alt-tabing.