These are symptoms of other people being unable - and/or unwilling - to communicate properly, not you communicating slowly. If people actually cared about having a real back-and-forth conversation - and not just waiting for their time to speak - then a friend talking a bit slowly or jumping around trying to get their point across wouldn't be an issue. Have a bit of patience and take a good-faith interpretation of what they're trying to say...

In my experience, this is how it goes whenever there are more than 2 people in a conversation. The speed of the topic switching defaults to the fastest processor in the group, basically excluding any slow processors from the conversation.