Twitter just posted a shot across the bow of those who claim the service is not growing anymore. Measuring tweets per day, the post gives us a glimpse into the growth of the service.

Er....up and to the right. From the post: "Tweet deliveries are a much higher number because once created, tweets must be delivered to multiple followers. Then there's search and so many other ways to measure and understand growth across this information network. Tweets per day is just one number to think about. We'll make time to share more information so please stay tuned.."

It's good to see this from Twitter, and I'm looking forward to more. For my thoughts on what more might be, see my post from last week Friday Signal: What Marketers Want from Twitter Metrics.