That's good to know. What kind of flies? Are you sure they weren't just snagged in the mouth? I would think that if they hit flies, then they would probably hit a sabiki rig as well.
I can't personally verify but me and this kid had it out about how he caught gizzard shad on a fly. He seemed pretty confident in the fact. I know for fact people have caught asian carp, but good luck getting the secret out of them.
Heres the kids blog, take it for what you will.