The latest CEO (Opinion Studies Center) poll shows a sharp increase in votes for the independence option. On June 2011 60.33% of votes would have been yes while now this percentage has increased to 64.76%. You can download the full report in pdf format (in Catalan) from here. The results about the question on independence are on page 35.
The CEO is a public institution depending from the Generalitat de Catalunya and its polls are generally regarded as very accurate and not politically influenced. The poll was made using a sample of 2500 people and follows the trend of a sustained support for the independence of Catalonia. This is only the second time that the CEO includes a direct question about the independence but in the last couple of years there have been other polls made by universities and newspapers which showed similar results.
Below, the results from June’s CEO poll: