Yes, my youngest daughter has been diagnosed with ADHD-Combined (she has both hyperactivity and inattention), so we did complete the Connor's assessments. I think you need to understand that ADHD is not some kind of death knell. Basically, people with ADHD are wired a bit differently than the average person. Think of them as the "hunters" of our society - they are always alert, always processing information, always able to sense any new bit of information. If they had lived thousands of years ago, they'd have been in the jungle chasing prey, hearing the slightest noise behind them and turning just in time to see an animal ready to pounce - so they'd take immediate action. That's how they're wired. Up to 15% of the population is like this, all across the world. It's not unique to America or the developed world. The reason this trait persists is that there is an evolutionary need for people like this. In today's society, they tend to gravitate toward certain jobs - police officers, ER doctors, firefighters, construction workers - where they can be extremely successful.
Now, the other 85% of us are the "farmers" in society. We plant our crops in orderly rows, we remember to water them every day, we know that what we are doing is really boring right now, but in a few months, it will all pay off. We patiently weed the crops. We fertilize the crops. Every day, we have a pattern that we follow. That's how we are wired. If we were out in the jungle hunting prey, we would be dead inside of 10 minutes. Likewise, if an ADHD "hunter" had to tend the crops, the crops would surely die.
Understanding that this is not a "disorder," but rather just a difference in the way a child is wired, can really help. The biggest issue for ADHD kids is that they really have a hard time fitting in with what they're expected to do in school. They tend to be hands-on learners in what is increasingly a cut-and-dry, multiple-choice test world. They need to be able to learn kinesthetically. In a classroom of 30 kids, that's unlikely to happen, and so their natural antsy behavior is perceived as "bad." It's not bad, it's just different.
Anyhow, go ahead and have your daughter tested. Knowing if she has ADHD or not is not a label, it's a start to understanding why she acts the way she does. (And for the record, if the child has ADHD, one of the parents usually is, too, so you may notice as you fill out the assessment that you're recognizing either yourself or her father in a lot of the questions!)