In view of the number of votes, the graph is right now not statistically relevant. Moreover, the respondents are mainly very heavy Skype users (Staff, Super Users, Moderators), so it is quite biased. My guess is that most Skype users don’t use Group Chats at all!
But, Group Chats are useful, the same as conference calls, and perhaps even more. Just suppose you are working with some family members or colleagues on an event or a project …
- You can ask a question or make a comment concerning your project even if some or offline;
- Those who were offline can read the previous messages when they come back online, and add relevant information to the chat;
- Chat history and messages are saved, so you can dig in the story and evolution of the project or event preparation (to find back why “this”, or when “that”);
- Unlike a conference call, you don’t have to be all together available at the same moment.
- Not everyone uses Skype (not all of my family members for instance);
- Quite a lot of the bigger companies block Skype, therefore it isn't used in a multi-company environment.