I wasn't sure about their commitment either, but on the linked page, Min-Liang Tan (Razer CEO) comments:
"Well - our objective is to get the Blades to be running Linux flawlessly."
That seems like Razer is setting a clear target for Linux support.
But I'd expect if flawless Linux support was actually their goal they'd announce it more prominently, which they did not.
[1]https://www.facebook.com/minliangtan/photos/a.11684295504016...