My Vodafone NBN 50/20 plan is very slow downloading US-specific content (content not cached in Aus). The download speed I get from this US speedtest is 8-9Mbps. The pipe size ISPs purchase for overseas traffic (transit traffic which is much more costly than local peer traffic) contributes to the difference in the cost of plans and quality of service we pay for.
To compare ISPs I would be interested in your results from the US speedtest. Please set the city to Los Angeles. Could you kindly specify your - ISP, plan speed, result (down/up)
Using my example:
Vodafone, 50/20, 8/15 (yes upload is much faster)