Who's better educated?

This post on Instapundit looks at the claim that conservatives are under-represented among university professors because they don't have the education to handle the job.

Yet Republicans in the general public tend to be better educated than Democrats. In the 1994-2002 General Social Surveys (GSS), Republicans have over 6/10ths of a year more education on average than Democrats. Republicans also have a higher final mean educational degree. Further, Republicans scored better than Democrats on two word tests in the GSS--a short vocabulary test and a modified analogies test. If one breaks down the data by party affiliation and political orientation, the most highly educated group is conservative Republicans, who also score highest on the vocabulary and analogical reasoning tests. Liberal Democrats score only insignificantly lower than conservative Republicans. The least educated subgroups are moderate and conservative Democrats, who also score at the bottom (or very near the bottom) on vocabulary and analogy tests.