i would be surprised if it didn't wear in over time.....i've never had one that didn't, that was used. i have seen ones not used at all other than standard careful opening and closing that didn't wear in much. when you put it to cutting work though it will wear in, just be careful until you feel it's safe.
i'm kinda weird as i like early lockup. ive had to retrain how i think when i get a liner or frame lock knife with late lockup. i used to cringe and worry about using it so it wouldn't seat further. i finally got over it and just use them.