It depends on your kitten, when my cat was a kitten he ran away a couple of times. The first time he was gone for 2 days, the second he was gone for 3. But he came back each time because he loves me!!! Or so I would like to think!
I would have to say it all depends on if someone else finds the cat wandering the streets and feels it may be homeless or just trying to be a good citizen waiting on the owner to start searching for his lil one :D