A good point, and I should have been clearer about that.
I do think it's reasonable to talk about intelligence 'growing', and consequently about one intelligence 'surpassing' another. But AI's methods of thinking certainly won't be human, and it may reach human-parity on different metrics at very different times. Hell, we're seeing some of that already: AI can do I/O and data processing at superhuman speeds, but humans can still extract much more knowledge from a small amount of data.