I have two 560 ti 1GB and from basing your stats off the numbers Ive seen with my cards, it seems your about maxing out the performance you can get. I cant push either of my 560 TIs past .44kh/s on scrypt jane and about 175 k/hs on scrypt usually with -l F7x1. A thing to remember with the flags, is that it doesnt matter where or what order you put them in as long as the syntax is right.
the X kernel was meant to push Fermi a bit further with scrypt-jane. Together with -L 2 or -L 3 you might see some 1.x kHash/s for Jane.
The next release version will likely have kernel names like FS, FJ for the respective scrypt and scrypt-jane versions.