It's not the language itself that makes it low latency. It's the fact that it is effectively an audio shader language. Think GLSL but for audio. In the same way that GLSL can lead to lower latency graphics, this can lead to lower latency audio by sending the actual code to be executed at a place that it closer to the output.

For example it can be executed in the kernel driver, in a DSP, or even on an external device (e.g. a wifi speaker).