You don't need medal score. Really. Quite useless. Ain't gunna get you places. Try it. Go over to a recruitment page for raids and say "I got ??????????????? Medal score."
They'll just ask for your guns and grimoire. And light level. And race. And Internet connection. And religion. And light level. And age. So if you're a 18+ year old American/British person who's a Protestant/Atheist with virgin network with touch of malice, black spindle and whatever other gun THEN! You can join a raid.
Medal Score = Nothing
Unless you're comparing Games and Medal Score.
Example (Numbers are exaggerated)
Player 1 sucks at pvp played 1000 games and has an 750k medal
Player 2 is awesome at pvp played 750 games and has a 1mil medal.
You're pretty cute so far with that, I'm on android so I can't check mine but it should be just over a millo
It's mostly just how much you've played tho
It's neither good or bad. Its more a measure of time. On the other hand, if you haven't been playing long and quickly rack up a good medal score, then yes that indicates real skill.