Using the windows 8.1 WASAPI driver I was able to get a total input->output latency of 30ms. This is enough to lay down some beats with the Maschine Mikro mk2 controller. It's not exactly what you'd call "tight" but it's low enough latency to lay down some ideas in real time. Frankly, I wasn't expecting this at all! I was going to use it more as a step sequencer but now it's suddenly much more valuable. (EDIT: I did also try Asio4All but it's not nearly as stable as the WASAPI driver. It basically performed worse, especially at moderate to high CPU usage it started crackling very easily, even at maximum buffers).
FL Studio runs extremely well on this little computer as well. The 10 inch touch screen is just barely enough to make it possible to compose on the go with just the tablet part of the hybrid computer but maschine of course requires the controller which means you need the keyboard dock for the full sized and powered USB port.
The awesome part is the relatively long battery life. Playing around with the demo projects of maschine and FL Studio I predict that you get upwards of 5 to 6 hours of battery life even when the CPU is almost always running close to maximum capacity.
The Atom Bay Trail processor seems to be fast enough to make the system viable as a very impressive "sketch pad" or even for creating complete songs on the thing.
Haven't had this much fun with a portable system in a long time. Maschine + this tiny computer is a real blast and so ridiculously portable that just for giggles I'll try to create a beat tomorrow while commuting to work.
Extremely pleasantly surprised by all this! It's proven to be a better purchase than initially expected. Having said that.. I'm not sure how long this plasticky, badly built, little thing will last but as long as it does, it'll be a fun ride (and it has 24 months warranty so I'm not too worried).
Cheers!
bManic