These two things stand out

[arminor75]

No: HPFGUIDX 169903

> Anne Squires:
>
> This is from "The Leaky Cauldron and Mugglenet interview Joanne
> Kathleen Rowling: Part Three," The Leaky Cauldron, 16 July 2005
with
> Melissa Anelli and Emerson Spartz.
> <BIG SNIP>
>> MA: That sort of shuts down Heir of Gryffindor [theories], as well.
>
> JKR: [Pause.] Yeah. Well - yeah.
>
>
> Anne again:
>
> So, Harry is not the Heir of Gryffindor.
>
>
>

April:
I don't think JKR's response was definitive on this point. Without
seeing her face and hearing her voice, it is impossible to tell, but
her response seems uncertain. She definitely could have been
surprised by the conclusion that having the grandparents dead shut
down any heir of Gryffindor theories (a conclusion I don't
understand) and just responded the best she could under those
circumstances trying not to give anything away. The "well" in her
response is what bothers me, like she was going to say something
else and thought better of it.

I've thought for a long time that Lily and Petunia aren't
truly "full" sisters based on the "eye" clues. I tend to favor the
idea that they are still blood related (thus keeping the blood
protection spell) but not full sisters. (Could be half sisters,
cousins, etc.) Based on the JKR quote, we are going to find out
something "incredibly important" about Lily. I cannot help but
think that must tie into her family/the Dursleys.