6 months is a reasonable cutoff for a screening tool because it allows for changes in the environment. E.g. you might cope well in high school, but you move to university and suddenly your old strategies don't work anymore and your life is falling apart.
For the full assessment with a psychiatrist, they do look at one's entire life history.
It could very well be ADHD. Depression is certainly another possibility, but if your symptoms are more or less consistent throughout life, then it makes ADHD much more likely.
It's definitely a bit tricky. Depression can cause problems with attention. But also: ADHD people have depression at much higher rate.
> When I was young I used to look at the watch compulsively to check what time it is and I never went late to an appointment.
Lots of ADHDers come up with all sorts of coping mechanisms. It's one of the reasons the test misses a significant chunk of ADHD population.
> In addition these general questions that a lot of people can relate to will cause a lot of people to get unneeded screening
Yes, a lot of people have ADHD. I link to the study that shows high specificity in the general population. Empirically, the tool works. You gotta start getting concerned about your symptoms from somewhere.
The two minutes is a very short amount of time — much shorter than a typical speed dating slot of 5-10 minutes. People chat about all sorts of things: from work to previous relationships to “where are you from”-style questions.
With regular speed dating I had all sorts of chats, it usually enough for 1-3 threads of conversations.