Average is always ... average. MIF does not equal average. There are people who graduate with a high NSS and on the flip side you've got the people who finish with a low NSS..is average really average? Is above average actually average? etc etc...
I agree with HawkeyeHandler...it is out of your control. You can go out and fly the same hop with 2 instructors (do exactly the same on each hop) and get graded differently by each IP. (I'm not complaining about this, just stating the facts). It is what it is. Just do your best. Does it stink that you have to have a higher NSS for API right now? Yes. Sorry. Just do your best.