As you can with most full desktop environments.
It's one of the first things I teach people when I convert them
And I still disagree about Unity. As any desktop environment can be easy and fast to navigate. Gnome 3 Shell and Unity share a good portion of their UI's with each other. And are equally easy to get to your programs. The majority can simply right click and add launcher to taskbar for anything you use enough to warrant needing speedy launching.