No I haven't. If you think the other demos are more interesting please link to them. I'm just saying that this demo is biased and that we can't draw any conclusion from it. Actually the author has just confessed optimizing it for entertainment in a sister comment. That doesn't mean that the claim is false but it doesn't show that it is true either.
I think you misunderstood my comment. The same code gets generated if you call the function `float fast_rsqrt` or `float fast_isqrt` for instance. I intentionally wanted it to be looking like `Q_rsqrt` so that people pick up on it quicker.
