From Anne-Marie Slaughter’s review of Sheryl Sandberg’s book (among other gems):
When I was an assistant professor at the University of Chicago Law School in the early ’90s, I tried to explain to a prominent senior colleague why I had not yet managed to write one of the 10 or so articles required to get tenure in three years. He listened to me, then said, “Journals don’t publish excuses.”
Oh, young trainee with a thousand reasons: neither do search committees or grant panels or study sections.
In my experience on search committees (and there is lots more advice here, here, here and especially here) a very simple set of calculations is done in the first pass: what year did you get your PhD., what year is it now, and how many publications and small grants have you accumulated in that time.