This has been posted eariler, but it is hard to find the presentation by Rio Alto's CEO Alex Black.  Alex Black outlines what he has done for Rio Alto including the approx. 2 year timeline.  According to an earlier Mining Watch article on Drv, the feeling is Rio Alto and Alex Black can do the same for Drv.  A very interesting presentation.  Something worth viewing if you have shares in Drv.

When you open the link, scroll down to the presentation on Rio Alto (right hand column half way down).  Click on presntion and enjoy.