^agreed, the shy, quiet, more social awkward types tend to better in small groups, in larger groups they can find themselves talked over. In most meetings you'll find the more outgoing personality types try and take control, drowning out the quieter types. Same with parties and social events, quieter types generally need to be brought in to the conversation, they rarely initiate things. Not every outgoing person can understand how uncomfortable these ice-breakers can be for less out-going people.
Ice-breakers are in part supposed to relax people, shy personality types can feel they are being put on the spot, the exact opposite of relaxing.
It's all about getting the right ice-breaker.