Short answer: No.
Long answer: If you only count 10 reviews you basically makes it even easier for big publishers to bribe/extort excellent metascores. Also, 10 is a way too small sample size to calculate an average of. I do think however, that review sites should be reviewed for consistency and objectivity and excluded from the system if need be. A 2 out of 10 for Halo 4 is obviously a steaming pile of bullshit, even I as a Halo hater can admit that without having played any Halo, ever.
Edit: I voted yes because everything is flawed.
Ongoing bet with think-man: He wins if MH4 releases in any shape or form on PSV in 2013, I win if it doesn't.








