Just under 15 seconds for me. Methinks you need a better internet connection.
Seems like the main factor here is going to be round-trip latency, not throughput - i.e. it's going to depend on your geographic location, more than it needs to.
Looks like it's hosted in Arizona, US, so ymmv (quite literally)
Many, many sites are slow when on the front page of HN. Anecdotally it loads in under 10s for me.