I'll answer, though, since I feel rather strongly about this topic. Did I have extensive IQ testing done? Yes, they tested both my brother and me. Did we go to extensive drilling clinics after school and on week-ends? No, we didn't. For one thing they didn't exist in our area when I was in high school, for another we didn't have that kind of money when I first went to high school because we hadn't been here very long, and my father was still building his business, and third, I doubt my father would have sent us.
As it turned out, we didn't need them, although I won't go into detail because I despise people who go around telling other people about their scores on the SATs. In terms of school work, I was driven from childhood. I took an A- as a personal insult. My parents would take my books away when it got too late. I can't tell you how often they would say to me, just do your best, you don't have to be perfect all the time. What's in your nature is in your nature, though. I can still obsess about making the perfect meal or having the perfect roses in my garden.
As for these clinics for children that now exist, particularly in urban areas with significant numbers of East and South Asian immigrants, I'm totally opposed to them. There was a book published recently here in the U.S. called "The Tiger Mom", written by an East Asian mother highlighting the regimen under which her children lived. We have some right in my neighborhood...hours of homework, hours of after school and week end clinics, the only time not spent on academics or drilling spent on drilling on a musical instrument...no sports, no clubs, virtually no social life, no tv, no time to just dream, for God's sake. I think it's a form of child abuse. If it doesn't drive them to suicide or quiet madness, it produces, in my opinion, people with no social skills and no ability to be creative or think outside the box. Plus, it doesn't foster any leadership qualities whatsoever. As my parents understood ahead of their time, there has to be a balance.
If your child needs some extra help with one subject or another, help them yourself or pay for the occasional tutor, but this? Absolutely not. They need to socialize, they need to play sports for health reasons, for mental health, and for learning team work. The most important thing, however, in my opinion, is that you do everything you can to help your children develop into kind, honest, hard working, well-adjusted people with a capacity to love and be loved, and who are making the most of what my teachers used to call their God given gifts, whatever they may be, and to whatever level they have them.