USB3.0 superspeed signalling tops out at an effective 400MBps, while USB-C is effectively a reimplementation of USB3.2 at present which gives you a data rate of about four times that (although I think it depends on the extra wires in a USB C plug and cable, so a USB-Type A socket running USB3.2 would only run at the same speeds as USB3.1, aka double that of USB 3.0). But 400MBps is still about 200 times faster than my current internet connection, and still faster than original 3Gbps (aka 375MBps - note the capital B), so it's probably more than good enough for me.