Questionnaires went, at various points in the study, to both mothers and children. But the conclusion about how well adjusted the children were was based entirely on the reports of their mothers. A more accurate, if less punchy, headline would have read: "Lesbian Mothers Think Better of Their Kids than Heterosexual Mothers Do."
Do you sense a double standard here? You have a study funded by gay activist groups and conducted by a lesbian activist who is married to another lesbian activist. It fails to control for some rather obvious important variables -- an omission that would be expected to skew the results in the favored direction -- and its results are trumpeted by CNN and Time, among others. Studies finding racial differences in intelligence, no matter how well respected and disinterested the investigator and no matter how well-designed the study, are routinely ignored or treated as superstition. Moreover, the mere identification of a funding source (Pioneer Fund) is enough to completely discredit the studies.