[crazypyro]

Facebook is still used heavily by younger people, especially in their 20's and late teens. I see Twitter falling a lot harder in popularity than Facebook. At the end of the day, "everyone" has a facebook. Most of my friends don't have a twitter and only use it when linked to it from Reddit or some other site.

Twitter does seem to be gaining in the international recognition, probably still residual effect stemming from the media attention gained by the Arab Spring and other social news events that unfolded on Twitter.

[saberduck]

Twitter is for me unique that it is used a lot by opensource developers and more broadly IT envagelists/figures. It's a goto resource for news related to frameworks, dev conferences,... LinkedIn aspires also in this area, but it's not relevant yet.

[dublinben]

I find it highly ironic and counterproductive that so many "open source" developers and users live on a proprietary platform like Twitter. Free alternatives exist, but they need the critical mass that a community like that could bring.