People do in general prefer trains over buses. This article is basically just saying that as you make the buses more train-like by giving them dedicated lanes and more reliability, people start to like buses more. Make them longer (articulated), faster, with dedicated lanes, and basically they start to become like a train with rubber tires. I think that is in fact, confirming people like trains better.
Titles do matter and I have an issue with the title of the article. It's like saying people prefer lobster soup over pea soup, but as you start to add more lobster to the pea soup... people start to like the pea soup... and therefore, it's a "myth" that people prefer lobster over peas. People prefer faster, reliable service with fewer stops - duh.