No point doing them, they take awhile todo and getting 4 people takes a while.
Personally I think forcing people to group is a stupid mechanic and just makes people skip the content (look at aion, you had to group to finish a area which meant if noone was around you had to grind....look where the game is now.)
I watched a guy last night asking in /1 for over an hour for people to join him in a 4+ quest....he eventually gave up.
Why didn't you help him? You complain that its so hard to find groups, but you do nothing to help other people find groups? Any complaint about this from you is now invalid.