I would agree, but I don't think there was a lot of PR around the beta. I suspect that once Wizards begins to push the information out on their site and the URL is printed on future books, that it will see a lot more interest.
My players, some of whom DM and have DDI subscriptions in the past, had not heard of the tool yet. One would assume it is only the most hardcore involved so far and once there is an official release it will be on the WOTC site and get a lot more attention.