I can only reproduce this after first initialising tooltips by displaying one. If I click on another application, there is again a ~1 second delay before the first tooltip is displayed, after which all tooltips are displayed nigh instantly.
** Changed in: gnome-panel (Ubuntu) Status: Unconfirmed => Confirmed -- tooltips appear instantly https://launchpad.net/bugs/45020 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs