Agreed and upvoted, I feel this sort of caveat should always be made. Also I don't like some of their other language here, but on balance it doesn't look like english is their strong point, so give them some slack.

The researchers didn't write the article headline and aren't responsible for it. If you're going to criticise people for being overly vague in their claims, it would be helpful to do so with some moderate level of accuracy.