Beta times can vary on pretty much any variable. Us on the outside cannot say what Larian can and can't do in a month. We can look at the industry as whole and make guesstimates and we do.
M&M X, they surprised us and popped out the final version much quicker than planned. It wasn't polished enough, it was still a fun game and all, but there were several game breaking bugs, performance issues etc.
One of the pluses for Larian is they have a patient group of players, to me most people have stated, released when done, because they know how good the game can be. I hope the EA $$$ etc allows them to wait until it's done. (So the next time you are in the middle of a "Why pay for beta" thread on Steam or the like, mention that it also allows the dev's to develop longer and not have to rush things out.
We all win when the game is well done.
