My gigabit internet in HK was similarly priced to my gigabit internet in suburban USA (like US$80/mo). That said, in HK areas with robust competition between ISPs, some of the offerings were shockingly cheap. A friend of mine got 10Gbps for less than US$100/mo after negotiating. I don’t remember if HK lines were symmetric or not - my US line certainly isn’t.
Note that symmetrical gigabit connections in the US are sometimes available. Its highly dependent on the type of network deployed. If its a PON deployment there's a good chance you're going to get a symmetrical connection (AT&T, Verizon, Frontier Fiber). If you have a coax connection (Spectrum, Comcast, Cox), there's little chance its symmetrical.
For example, at my home on a residential PON connection a recent speedtest today showed ~990Mbit down, ~978Mbit up. At my office's new business coax connection just a few miles away, I usually get ~980Mbit down, 30Mbit up.
