Gearing for 12 (fps)

I know there are other threads on this, I've seen them, and none have answered my question.

I suggested to my mentor that we gear for about 12 to 13 fps for max speed. He told me that was a ridiculously fast speed, and that last year our top speed was like 6 fps, something I don't think is right.

So my question is this: IS 12 or 13 fps a really fast speed to gear for, like my mentor said, or is it a perfect speed to gear for, like I said?

Thanks, and I appreciate the help.