Comment by Ensorceled

> Should I want to post about some programming stuff? Doesn't belong on FB.

That was kind of my point #3. You already had Facebook for your friends so G+ became your network for your geek friends and geek co-workers. If you're not a geek, you were already using LinkedIn for that purpose. That's a small market.

OO Programmers (and biologists) are the only people who naturally think in terms of complex taxonomy.

Agreed, their real name policy made it completely unattractive for many purposes, including Mashable trying to set up an account and needing to rename it to Pete Cashmore (if I remember right). But Twitter is not tech heavy, it's tech/startup/entrepreneur/media heavy, including tech but not strictly limited to it.