Most importantly... An IQ test measures one thing -- the
ability to take an IQ test.
I can get away saying that, because I consistently score
in the 99th percentile.

So instead of saying "Oh, you're so smart!" we should say
"What a great IQ test-taker you are"?

That's about right.

The original IQ test was designed to see whether a child was ready for
school -- whether he or she knew certain words, could tie their shoelaces,
etc.

I'm smart, but I'm also a good test-taker. If you lack test-taking skills,
you'll score lower than you should.