No stat can say any thing about skill.
Players who play mostl with clans have an other skillset than people that play alone
And people that play domination have another skillset than people that play TDM etc.
When I play dom for example I will try to cap and defend the flags. Other people just rush the enemy flag to get kills and die
And when I play kc I'm a tag runner.
And playing TDM I can play slow with a sniper. Not good with sniper so than I will go worse.