EPL 14/15 Goal Difference vs Score Adjusted Shots on Target Ratio (w/ Score Adj PDO) (26 matches)

I have taken @objectivefooty 's tracking of Score Adjusted Shots on Target Ratio in the Premier League to date (26gms) and compared to Goal Difference. http://objective-football.blogspot.com.es/2014/10/201415-score-adjusted-numbers.html
R-squared = .886