<p>Doesn't the Woodrow Wilson School of International Affairs count as a graduate/professional school? It offers bachelors degrees, too, but it seems more graduate school in character. Wharton (U. Penn) offers bachelors degrees too, but most people would call that a graduate/professional school.</p>
<p>Princeton Registrar counts 2029 graduate students and 4761 undergraduates in the 2005-2006 year, so graduate students make up nearly 30% of the student population. I'm not sure if I would call that the "very small contingency"... I would feel a little slighted by that comment if I were a graduate student at Princeton.</p>