I completely disagree. People are all saying "Oh, well, a terrorist would try to hide it, they wouldn't stick a circuit board right on the front." True. But a lunatic would. She was unable to explain why she was carrying around a lump of Play Doh (what adult does that?) so if you couple a sweatshirt with wires coming out of it, and somebody holding what could easily be taken to be plastic explosive, I think you've got someone who was definitely trying to look like a bomb.
Remember that air port personnel are not engineers. They ask "Why would someone have this?" and if the logical answer is "It could be a bomb", then they did the right thing.