RE:Motley Fool's articleI think the "relative" pe comparisons are misleading. Utilties are considered a safe haven and never moreso than now, and so an acceptable industry pe is a moving target. Better to look at fundamentals individually IMO.
Also, the assumption of continued growth rate is brave. The bigger and more diverse it gets the more challenging it will become to manage. Economies of scale can give way to diseconomies of scale. Not that it had a lasting effect, but just look at the way things snapped back the moment there was some uncertainty about the tax situation (or whatever it was) last year. Fortunately, it did not turn out to be a serious problem, but it goes to show how little shareholder there is for a great performer like AQN the minute something goes wrong (imagine if they started to miss on growth or got into a pricing problem like Capstone Infrastructure did).
Having said all that, I still like AQN for many reasons. I just think some analysts get ahead of themselves.