The WSJ ran a story about LinkedIn’s $53 million cash infusion here. And I found this line interesting:

LinkedIn’s average user is 41 years old and has a household income of $109,000, according to Mr. Nye.

Facebook said it doesn’t release specific demographic information and declined to comment. But the company’s Web site says more than half of Facebook’s users are outside college, and users aged 25 and above represent its fastest-growing demographic group.

Hmmmmm, as we pointed out in February, Facebook still has a pretty young audience (about 23 years old, on average when we looked at it then - based on Facebook’s own numbers) . It looks like the parents use LinkedIn and their kids use the Facebook, on the whole. It’s too bad the writer of the article didn’t find places online where this data has been collated, such as our site. We’re probably due for an update on the figures, it’s true - but we’re always happy to help out.