That is your opinion. These universities students are politically aware and are educated.
I believe all Pakistanis who are knowledgeable and politically aware and do no stuffer from political affiliation support Imran Khan. This is true for Karachi, Lahore, Islamabad, and every other city of Pakistan. Though it depends how many people fall in this category regarding political awareness.
You know how government universities are filled with thugs of established parties. They common students even in those universities do not support parties like MQM, JI, etc, though they are very strong in these institutions.
In Punjab University, Lahore, JI is very strong and also in many other public universities in the country. Though I know as a student in one of these universities their scant support but pervalent thuggery.
I also note again, MQM's thugs posting banners against Imran Khan on the gates of certain universities of Karachi after they saw the support of Imran Khan among students.