Nielsen Came out with a new report which gave some US demographics on WoW players.
In a chart comparing the PC game usage of females and males aged 25-54, World of Warcraft was the most-played "core" game for females, with over 428,621 unique female players estimated in December 2008.
The statistic is even more impressive when considering that an estimated 675,713 unique male players of the same age group logged into World of Warcraft during the period, indicating that the WoW gender gap may not be as large as some imagine.
To cull the numbers, Nielsen uses a software meter to measure game usage on 184,000 PCs worldwide. The metric program is capable of tracking over 1,700 PC games, according to the company.
Another Nielsen report recently indicated the average WOW player plays 649 minutes a week or about 11 hours.