Processing speed
I think there's more to intelligence than processing speed. For instance, in the Wechsler Adult Intelligence Scale, speed is just one of four broad aspects of performance which are evaluated--the others being verbal comprehension, perceptual reasoning, and working memory. It's possible to score well above average in the latter three but still be a slow processor. I suppose you could say "slow mind thinking, but doing so quite well when it gets to where it's going."
As an interesting aside, you may be wondering what happened to quantitative reasoning. It's now included in the broader verbal measurement, which can only lead us to conclude that mathematics is indeed a language.
