Even with a firewall blocking access to large parts of the site for non-subscribers, traffic is still growing at a most impressive for the WSJ – according to its own claims.

According to internal numbers, WSJ.com hosted 15 million unique visitors in March, reports Portfolio, a 175 percent increase over March 2007, Alan Murray, executive editor of the Wall Street Journal Online told it.

Page views came in at around 165 million, up 75 percent year-over-year.