Out of curiosity, I recently checked up on the publishing record of my entering grad school class, via Pubmed. Out of, I think, 30 or so people who started the class...
2 quit grad school
17 have some kind of authorship on a research article
7 are first authors on a research article
As I'm in that last group (and have another first authorship in the pipe) that made me feel pretty good.
Also:
2 students have defended (one more is about to)
1 of these two has left and gone on to a postdoctoral position
Now I just need to arrange to have all my faculty in the same place at the same time, so I can defend and leave...