Someone at the Times isn’t doing their homework.
57% of Twitter is 26 to 44 yrs old
I’d bet the average Tumblr user is well under that age bracket.
Blog “purists” will tell you that Tumblr isn’t “real blogging” and define it as long form post that take time to put together, whereas Tumblr is mostly quick shortform posts with an emphasis on photo, video and links.
Traditional longform blogging was always an older pursuit, the attention span of the young has always been short. If anything, Tumblr has provided a platform that did not exist before. It didn’t replace longer form blogging platforms, it just gave another option and captured a generation that had little interest in blogging in the first place (other than livejournal)
Will the generation that grew up on Tumblr graduate to other platforms as they get older or will they just post long form post here? That’s yet to be seen. There’s nothing stopping anyone from being loquacious here, it’s a matter of what you decide to do with it.