...typed the person into his quantum-mechanically-mediated instantaneous conversation with ten thousand of the best-educated technologists on Earth.
You're going to have trouble convincing me that Google doesn't make me more intelligent. You're also going to have trouble convincing me that, say, cheap printing and cheap food -- both products of the industrial revolution, and without which I might be a subsistence farmer -- do not make me more intelligent. I wouldn't know quantum mechanics without them, after all, so I wouldn't understand how computers work.
And if you strive to define "intelligence" such that human intelligence has not been improved by technology -- which can be done; I'm clearly less intelligent than my Cro-Magnon ancestors by many criteria -- you are going to have a hard time convincing me that the future will be any different. If technology hasn't worked to improve "intelligence" before, why should it do so later?
Why not?
Google does a lot of things right, but they don't have all the smart people.
Edit: it's called the Flynn effect, and if this phone had decent copy and paste, I'd give you the wikipedia link, which you now are forced to find on your own. But at least I can rest reasonably assured that your general intelligence is sufficient for solving that task ;-).
Are you referring to HN?
We don't expect the singularity to improve the intelligence of transistors. Perhaps it is unreasonable to expect that previous intelligence explosions of a collective being massively improved the intelligence of the humans comprising it.
I bet it led to a significant increase in the average IQ. It may not have been a Singularity with a capital S, but it certainly did reflect back on its creators.