I recently renewed a contact with a guy who used to be in the same research group as me. He is now a professor at a pretty prestigious school. I started looking at other former memebers of the research group and found that 4 other contemporaries of mine are also professors. There may well be others that I've lost track of as they've returned overseas.
Now consider these facts: 1) the number of professorships in engineering is not increasing at any great clip 2) a professor needs over the coarse of his/her entire career to only have one student become a professor as to ensure that the field doesn't shrink. It would then seem that my advisor turning out 5 professors within 5 years is, if not a record, pretty impressive. Can anybody top that?