There is a high+, you obviously aren't a high+ in call of duty 4 Promod competitive if you didn't know that.
That also would mean you are LAN experienced with call of duty 4. and you have a team.
I'd say I'm maybe a Medium+ to High. I probably used to be high but now I don't know. My aim is kinda off because I haven't played Xbox in 3-4 months :/