This is completely untrue. According to Graham, the lineart shows no tail fin deviation from the standard VF-1's.
really I have heard otherwise but if its Graham who says than thats almost as good as Kawamori.
At the MW con, Graham sent early versions of the Ostrich over for us to look at but Shawn was quick to point out how stubby the rear tailfins were. If the two Sith lords think it looks funny then it must be off.