Oh Twitter how you’ve grown. It is being reported that Twitter has passed the 300 million registered account mark.

Although what this means in reality is unclear as having hundreds of millions of registered accounts is not the same as having hundreds of millions of people tweeting.

The report of Twitter passing the 300m mark comes from Twitter tracking site Twopcharts, whose chart is below. It says Twitter is adding around 5.5 accounts per second and has already hit more than 301,331,151.

If true it will mean that Twitter has added more than 100 million accounts since February when it was being reported that Twitter had more than 200 million.

Although of those tens of millions of registered Twitter accounts there are far fewer very active users as we reported here recently.

More than that, the number of daily active accounts is thought to only be around 14 million although there are maybe as many as 40 million tweeting each month (and rising).

The growth has brought much change to Twitter and that has been reflected in its recently unveiled new homepage. This showed Twitter sees itself increasingly (in part at least) as a media firm.

Some, however, are sceptical of the new figure. As RWW points out Twitter’s own business page does not agree with Twopcharts and says only it is signing up 460,000 accounts daily and has 200 million-plus users.

It says it contacted Twitter and received this response: “Twitter has responded but all they would say is that they have “more than 200 million accounts.” Nothing more specific than that,” RWW reports.