With your post, i slipt into two portion.
1 is the length of time knowing one another. Understanding strength
and flaws and gain communication.
2 is the change after you 'thought' you've already known the
person. Yup, you've mentioned the point on 'acceptance.'
Personally i think, with 1 month. It's not possible to grasp the
person's character and adaptation to his/her changes, though it's
not impossible.
Morever, it is usually expectations of willing party which will
decide on the outcome of r/s as a whole.
To accept a partner with only 1 month of knowing one another and
having gone thru physically all the way. It's not impossible. But
damn hard. 
