Earlier quoted context omitted.
Imho, what was happening in the Silicon Valley economy looks much more like displacement of value rather than creation of value (1). Google/Facebook have displaced other ad formats, redirecting money to themselves. AWS have displaced IT technicians in other corporations, redirecting money to themselves. Apple is selling overpriced commodity hardware, redirecting money to themselves. Uber is displacing taxis, redirect…
I think the ability to google things has provided immense, incalculable value, even if it's not value showing up in gdp figures.
To do a proper experiment, I suppose we'd need to compare otherwise identical individuals with differing education. Similarly, we could compare people whose only significant difference is the amount of search using Google, and assess their effects on GDP. Daunting to carry out these experiments, but possible in principle, no?