Normally, no...it doesn't make sense to merge the connection data with the user date. It's conceptually a completely different thing. User data is info about the user and connection data defines how that local user account is tied to some remote provider account.
Moreover, it's quite possible for a single user to have multiple connections, either to separate providers (Facebook, Twitter, LinkedIn, etc) or even multiple connections for the same provider for different accounts on that provider. It would be awkward, at best, for that connection data to be kept in the same table as the user data.
Spring Social Project Lead