Slightly off-topic here...
I am very suprised about the low numbers. Soren and Zultar and others have done a terrific job showing off multiplayer, both ranked and tournaments. OTC multiplayer seems really great, and I enjoy watching it.
That said I don't play multiplayer yet. I have over 70 hours in game and still have trouble beating the Manager AI. Multiplayer would be a bloodbath, I'm afraid, and my ego can't handle that. Hopefully someday I have some confidence in my skills that I can compete with the weakest in the multiplayer crowd. In the meantime I'm enjoying singleplayer.
The gameplay experience is already great, IMO, so building up multiplayer really boils down to getting exposure to the multiplayer RTS crowd. If I knew how to do that, I could quit my day job