I am also a kickstarter (Iron) backer, they say in their email:
We'll proceed by giving access to the game through several waves (not all Kickstarter Backers will have the game on Alpha 1, Day 1). Sponsor backers who already pledged will automatically get access on November, 29th, as it has always been stated on our Crowdfunding portal.
So I thinks they give access group by groupe, but for me also it's confusing, 2 day's ago I was still thinking I am going to be able to test the game today ...
Best,
Glorek