[kylelibra]

At first glance I thought the title inferred that Tumblr hadn't increased in traffic in two years, which was very confusing. A better title would be something along the lines of "Tumblr now does as much traffic in one day as it used to do in one month."

[trickjarrett]

I had the same confusion, and the sentence which explains it was less than clear to me - I had to reread it to be clear on what it was saying.

That's damn impressive.

[thelibrarian]

I think if "09" was changed to "2009" it would be much clearer. Especially as the full year is already used for 2011 in the same headline.