The loose use of the term "junk science" is a pet peeve of mine. It is frequently used to describe science "that does not conform to my ideology," or science with political/ethical implications. Here are some of the hallmarks of junk science. Some of the objective signs of junk science are as follows:
1) Lack of a control group or comparison condition
2) The methods of investigation are not clearly described or reproducable
3) Claims are not falsifiable (why even though I believe in God, it is clearly impossible to incorporate His influence in to my science).
4) Processes sound scientific (e.g., homeopathy), but do not correspond to known biological/natural processes.
This is a short list of what are considered the "warning signs" of junk science. Exactly which of these criteria do you think the study in question violates?
Furthermore, the stated purpose of Saleton's forum is not to merely report science, but to explore the moral and ethical implications of research.
As others have noted, I don't think Saleton's arguments in any way reflect his views of homosexuality so much as he is attempting to refute the non-scientific beliefs of a VERY vocal minority.
Your point about bisexuality is to a point valid. This study does not acknowledge the complexity of sexuality. But, a single study can NEVER explore all levels of complexity of any phenomenon. That is why science is a PROCESS-we work toward the truth. We never claim to have achieved it.