This is extremely misleading!
A lot of those countries with lower cost are very small and have very low amounts and easy to implement infrastructure to support their broadband. And others like SYRIA, broadband may be the cheapest, but access to such services is virtually non-existent, so of course its cheap, $0 have been invested in infrastructure there.
You want avg speeds in the US to equal Taiwan (85Mbps)... how many TRILLIONS do you have to invest in the infrastructure to support such a system nation wide?
A fair and accurate article would compare the US prices and speeds against countries with similar sized (sq-mileage), similar population, and similar access to services. Bottom line, there are 3 major variables not accounted for in this article!