+1, Ian I belong to 8 Morgan groups some of which are not on your list and it increases your knowledge of the cars and virtual friends - why limit horizons is my thinking. I didn't seek them out but got invitations to others having joined the first one and as most are in different countries/languages they are interesting.
Having said that I don't belong to MSCC as it offers very little for me and I leave Twittering to the birds.
TM is too well established to feel any threat from the other networks, the best view imitation as flattery is my experience.
There is room for everyone guys.
Gomog was around long before TM and they don't feel threatened by FB groups or TM I'll bet.
