I just tried your plugin, only the admin user was migrated to both, none of the other users accounts were brought into wordpress.
Also, the admin account that was detected when I setup wordpress did not log me out of xenforo when I logged out. I then logged into xenforo and did not get logged into wordpress. (I tried both way's and it didn't work)
Everything in the setup process went fine, it detected the forums and on the wordpress post page I was able to select a forum to auto post the blog to. However, when I posted to wordpress with the forum selected it did not put the post into xenforo.
Also, I'm using xenforo 1.5.