Heheh. Indeed! Well, yes and no: I mean, to me, it's always been canon that Alianna, PC's mother, was a priestess of Bhaal, and that Gorion lied to PC in his last letter. It's also been canon to me that elven PC aged faster(so she was twenty, not a hundred), and that during Time of Troubles, PC was eight or nine - so that she becomes around eighteen or twenty during BG1. But that's only me.
I always liked gorion's version better.