As someone who supports the introduction of the CSeries at Island Airport I think it was absolutely stupid for Porter to associate themselves with Nick Kouvalis. He is like the conservative version of Warren Kinsella - a political operative who works in the shadows.
Porter could have gone to a reputable polling firm and the survey results would have been similar.
The Toronto Star did a survey (Forum Research) which found large support for jets being allowed on the Island. The numbers in support were not as high as the Porter survey but the questions were very different.
In the Star survey they did not refer specifically to the CSeries because they wanted to be able to compare the results with early survey's done.
This means that the Toronto Star survey was something like "Do you favor jets being allowed to fly to the Island Airport" whereas the Porter survey question was "Do you support allowing jets to fly out of the airport if they make a comparable amount of noise to the turboprops currently being flown from the Island Airport?"
To be sure some of the respondents to the Star survey were aware of the quiet properties of the CSeries but I suspect most of the respondents are ignorant of this fact just as most of the people on city council are completely ignorant on this issue.
While it was incredibly stupid for Porter to commission a political operative to carry out their survey it does not mean that the conclusions reached are incorrect.