Nice try, Gavin: In an attempt to convince us that Lord Monckton is an unpersuasive speaker, Schmidt points us to a survey of 125 people done seven months after Monckton spoke; 105 of the people surveyed weren't even there during the speech in question

Twitter / ClimateOfGavin: MT #unintendedconsequences ...

MT #unintendedconsequences @LeoHickman: Students more convinced of climate science *after* Monckton lect than before http://garnetgoesgreen.blogspot.co.uk/2013/01/countering-climate-denial-on-college.html …

Garnet Goes Green: Countering climate denial on college campuses

I was interested in the extent to which his visit and the counter-presentations shifted student attitudes about the realities of climate change. In October 2012 I surveyed members of the sophomore, junior, and senior classes at Union College. 125 students participated, and results showed that students whose opinions shifted were far more likely to have become more convinced of climate change's reality, and the role that humans are playing. (A more complete presentation of results can be seen here [PDF], from a poster I presented at the meeting of the American Geophysicists' Union in 2012.)

Ok, so the PDF above says that "125 students participated, from a potential population of approximately 1500 students".  66 of the 125 had heard of the events of March 5; of those 66, 30% (20 students) had actually attended Monckton's talk.   This March 7 article says that "200 people packed a campus lecture theater to hear Lord Monckton speak".