It was true at the time...but it's a moot point now, due to the carbon tax and other levies.
From the link you posted above, the biggest factor appears to be lower gas prices, which makes sense
Back in the early 2000s, we decreased our heating bill by 80%, when we switched from propane to coal
That ship has clearly sailed.
I'd imagine the guy quoted in the article is pretty happy to be burning renewables right now.