> shown to cause more weight gain than equivalent sugar The article you link doesn't say that. First, almost nothing in it even talks about real sugar. Second,

> shown to cause more weight gain than equivalent sugar The article you link doesn't say that. First, almost nothing in it even talks about real sugar. Second, it specifically starts with in the first paragraph "doesn’t prove that diet drinks and artificial sweeteners cause weight gain" and then goes on to have more paragraphs of speculation on correlation. But nothing mentioned in that article demonstrates a causal effect, and definitely not more than equivalent sugar. There's a lot of "may be" and "may cause" in there. Emphasis on may.