I think probably around 4 mos..and like i said in PM I would probably, knowing me LOl confront the breeder with a wth? The more you have seen him the more you think he's older than she said. Is there any possibility you got the dates wrong?
Not that it matters in the big scheme of things. he is still YOUR BABY Kim and yes you will bond with him and he will be a friendly outgoing lil monster that sticks to you like glue.
I just know it! Put those patience and knowledge you have developed to work. And since he did come from a breeder I think he will be easier just for the fact he hasn't been tossed around and shipped from pet store to pet store..and has probably been handles NICELY not cruelly or roughly.
It's all good Kim. he's a keeper and a beautiful one at that

Now...start workin on a name! lol