Judge a book by it cover is a mistake only noobs make
Note the use here people noob as in you think you know what your saying
ONLY way to get a idea of somebody skill level is to watch them.
Do they control the map and fights so they always have the higher hand.
Another problem of looking at somebody w/l do they play in a party or not

numbers cant tell you that.
Etc
Only once i play somebody you get a rough idea if they are decent.
Btw you should fear pres players and non ones in equal amounts