Imo yes, probability of playing with friends is much higher. It could be purely coincidental but i even face friends of friends often at lower levels. So if you hate someone, just add him and add well trained players around the same quality and level. Associations seem better now. We used to get drawn with fb friends often.

I dont like playing with people i know. Too much pride and ego involved. Trash talking on a bad day can ruin friendships.