I can't agree you with that. Other JC Shadow with KC-Balance hybrid spec from our guild makes at his best like 440k damage. I have ONCE made over 300k damage with pure Infil. And yes, you can explain this by saying that I'm a bad player and so on, but I can tell that we were equal while we were using the same infil spec.
However, Infil is good for single burst damage, but force is restoring slower, you're not as strong as KC-Balance and if you don't get crits a lot, dps is going to be low. :/ I find this very sad, because I found infil very nice and enjoyable spec. And remember that I'm talking about PvP, where it matters that how strong your char is. Even though you don't make as fine single burst damage as infil does with KC-Balance, you're stronger and you can make more damage in a longer time than infil can.