I didn't deny the 2GB possibility at all. I think i had enough talked about the Wii U memory state, go back to thread part 2 and you'll see that there's more (with the following answers to the first post concerning that) than just "it's more than 1GB".
To sum up, Nintendo are apparently aiming for a memory quantity in the retail version bigger than 1GB (or a weird number like 1,2GB), and this made me surprised.
It's between 1,5GB included and 2GB included. It's in a V4/V5 dev kit context, so the situation could change after. It will be the final precision of my previous informations regarding that