Quebec political scientist Maurice Pinard has written an excellent analysis of the election and the polls for the Centre for Research and Information on Canada.
I largely concur with his analysis of the polling and the election results. He averages the final polls to conduct his analysis. However, I would argue that if you look at the closing ten days of polling in Quebec you see a steady upward movement for the Liberals. The final poll, released Sunday June 27, predicts the outcome in Quebec precisely.