I don't think this chart really tell much because most services are hosted in the US which some of these country have small or no direct link to (e.g. Thailand

I don't think this chart really tell much because most services are hosted in the US which some of these country have small or no direct link to (e.g. Thailand is 6th fastest in APAC on average speed, but the whole country has total of 30Gbps direct link to the US and pretty much have to route everything via HK or SG) which sometimes result in horrendous latency (~500ms) or speed (< 1 Mbps). It's fast at CDN edge where these surveys are taken, but page sizes still matter a lot.