With a standard 4G/FTTH connection that's less than one second of download time.
Some guys think the web should be usable with a 50€ smartphone on GPRS, and I say no, because there's a middle ground.
So where's your middle ground?
You went to the other extreme though. Most people in high-income countries don't even have FTTH.
Surprise, many many ppl use facebook in crap laptops, fb is popular with everyone.