Yes, with a similar meassurement method I also get less than 1 ms.
But I'm meassuring the latency in a different way. From a practical point of view I'm interested in the latency between the key (or mouse button) hit and the first sound comming out of the speakers. Of course here the MIDI player device is involved.
I use Audacity to record both the mouse click sound for activating the first bang and the speakers with the MIDI sounds. This way I can meassure the latency back in Audacity.
I'm curious to see other laptops' latencies using this method. I use a Toshiba. Could you guys let me know your laptops' latency? Thanks!