I read the article. According to some German native speakers, Dr. Eisenberg wasn't saying the disorder was fictitious, but overdiagnosed, which is true. Apparently, the software translator didn't do a good job at translating correctly the said word. I am not surprised at this. Computers are bad translators of text, since they can take things out of context. Again, not surprising.

The point of all this is this: ADHD is a brain disorder, which can be recklessly diagnosed, and the consequences range from the mundane to the serious. What if the person truly has Asperger's? According to Wikipedia, many people formerly diagnosed with ADHD as children had Asperger's in reality. Others were actually just being kids. What should be done is a very thorough examination of the person using evidence-based diagnostic batteries (believe me, some psychologists still use projective crap which doesn't work).
So, while internet tests are suggestive, the best is going with a professional to get carefully diagnosed.
Best regards.