"Is it?" when taken out of context on its own indeed qualifies as a question, well done. I am not slating her at all for her use of either the word "is" or "it", and would commend her for having the presence of mind to include the "?" in an attempt to cover her tracks.
When the mother turned it around to probe whether it was really a question or simply a veiled statement of the presenter's opinion, the presenter replied extremely unprofessionally, quite clearly admitting that she wasn't asking a question by giving an answer that she made it obvious she considered fact, as well as pointing out that she was "horrified" by the dress choices of a 15 year old girl.
Essentially this "question" you want to cling to was "It's not normal, and I'm horrified". I only wish she'd phrased it as frankly as that, because you could then at least make the argument that she was being so obviously Daily Mail-tastic that perhaps she had convinced herself she was a character being sent up in Brass Eye.
She was simply pandering to her audience, you are well aware of this, and every counter argument you have tried to make has been pretty disingenuous in one way or another.
You know who she really wants to interview next? G.I. Joe.
Dolls? Dressing like humans? I'm outraged!