Optus over in Australia also use Huawei's 4G solution for their retail Home Wireless Broadband. It is sold in a similar way, i.e. as DSL/cable replacement. They advertise up to 12 Mbps on 2300 MHz areas up to 5 Mbps on other areas download and 1 Mbps upload.
http://www.optus.com.au/shop/broadband/home-broadband/network/internet-speed
So it seems Spark's offering is relatively "unconstrained" when compared to this. Maybe they have more spectrum available to them than Optus.