Yoshie,
If you want some "hard numbers" then I suggest counting (a) the number of postings to m-fem, lbo-talk, pen-l, psn and kindred listservs serving the campus left that deal with one of the following: the role of this or that -ism (capitalism, racism, sexism, neoliberalism - you get the drift, right?) and kindred abstractions in causing an empirically observable phenomenon (usually reported by the mass media), a diatribe against this or that -ism, a rebuttal of the diatribe mentioned in the previous item, the 'proper' interpretation of a text written by someone else (usually having or aspiring to an intellectual celebrity status), the meaning of a term charged with emotive connotations, the meaning of an event reported (i.e. made salient) by the mass media, writing a text (an article, a letter, etc.) reporting on the author's feeling toward that event, etc.
and then counting (b) the number of postings that deal with one of the following: what are the political goals we as a group want to accomplish in a short and a long run, what is the priority of those goals, do we agree on the assortment of goals and their priorities, what is the probability of their attainment, what material/organizational resources do we need to attain them, what are other costs/requisites of their attainments, who are our friends and foes and why, what specific actions need to be taken and in what order to attain those goals - etc.
and then reporting back to us what is the ratio of (a) to (b). If you can up with a ratio less than 50% then I would admit that the campus Left is engaged primarily in political activism, rather than id politics, schmoozing, or plain academic hair splitting.
good luck with your data work
wojtek