How about we wait for TGS?
There might still be many suprises, remember how before the slim announcement everybody thought Sony were dillusional because of their estimation? Looking back, we should've realized back then what Sony is planning.
We should do the same here, most of us can't see them selling 13 million in this fiscal year, but, what if they announce a FF7 remake for this holiday season + KH3 and a ND crash bandicoot? will that make the estimation more probable? We can't make true estimation before we have all of the variables, no matter how far fetched they seem.
Bet with Dr.A.Peter.Nintendo that Super Mario Galaxy 2 won't sell 15 million copies up to six months after it's release, the winner will get Avatar control for a week and signature control for a month.