Currently, when you click "Join Group" to look for a multiplayer game it'll search for 10 seconds. If it doesn't find a group within 10 seconds, it kicks you out to a menu where your options are:
1.) Search Again, 2.) Create Group, 3.) Main Menu
Since there is a "Cancel" button available when the game is searching for a group, I recommend letting it search just a little longer to reduce the amount of times players have to click "Search Again." Increase the time from 10 to 30, or possibly even 60 seconds.
The only reason I'm mentioning this is because when I'm trying to find a group, I often have to hit 'Search Again' anywhere from 10 to 25 times before finding a group during the slower times. I know I can create my own group at any time, I just prefer to join others for some reason.