I don't know you, and I don't know what you do or know, so I'm not trying to say you're lying or don't know what you're talking about.
But what I do know is John Gruber, who has enough "little birdy" friends at Apple to know what he's talking about, says otherwise. See my prior post
here. Specifically this quote from Gruber:
Granted, the latter sentence is his speculation, but, again, he is in a position to know. Even if that part is wrong, the hardware design was locked just shy of a year in advance per his source at Apple. It could be that shifts year to year, but I'd be really surprised if they were making "siz[ing]" changes six months prior to mass production, let alone anything else.