I feel that this was covered by the article (there's a second part) with the conclusion that this cannot be the main factor of the obesity epidemic. Margarine consumption was much higher in the 1970s than today, but obesity today is much higher.
There may be a generational effect at play, causing the symptoms to be more pronounced in the offspring of the high margarine cohort. Certain interventions effect second and third generation offspring. You can induce sterility in the third generation by an intervention in the first generation for example.
That being said, canola oils and soybean oil are more used than ever.