Yes, Seeker, in my FE is too slow to follow turnfighters too.
Usually it looks in this way : I am at Spit6 , D=1.0 , i see him rolling and i *know* he will turn , but as soon i see him starting a turn and i try to lead him, *suddenly* his plane jumps and I see him in my (usually) left view, in opposite side of circle ...
Only way to kill Spit/nik is to B&Z , B&Z , B&Z , B&Z , B&Z , B&Z , B&Z , B&Z , B&Z , B&Z , B&Z , B&Z untill he gets very slow.
But usually in the process someone else comes in and steal kill or kills you.