@tk21769, Cornell has impressively high PhD production, but if you’re going to say that Penn has relatively high PhD production, then you have to say that Cal has relatively high (or higher) PhD production as well as UMich and UVa.
On even a per capita basis, Cal has higher PhD production than Penn (despite lower entering stats on average) while UMich and UVa trail Penn only slightly in per capita numbers.
Penn isn’t in the top 50 in per capita science and engineering PhD production (or per capita PhD production across all subjects, actually): http://www.nsf.gov/statistics/infbrief/nsf13323/