To be fair though, taking the business out of it and only considering the interface, I never used twitter and I'm pretty sure I would have thought that was shit.
Users can prevent other users from ever getting to a stage where they can down vote people. I can never find anything interesting. The news sources are hard to summarise due to the interface. Stuffed I can follow conversations properly. I have so much screen space and it explodes all object size variables so its like Im using it on a phone. Which makes it even clunkier.
Perhaps Im just not good at using it, but my initial impression is that its garbage. So I have not been inclined to invest more time in learning how to use garbage.