Yes. It's easily possible to tell the power up cause source (ie: controller X button, console power button, IR power button, IR X button, IR windows button, wired controller X button and a few others) it just needs a bit of code added to dash launch to do so and act on it.
Would be great, but unfortunately my knowlege about xbox programming is not so good (but java
I also don't know if DashLaunch's is opensource (i don't think so).
I hope someone will implement this feature sometime.
Thanks for your advice