Sony's PlayStation 2 accounted for 42 percent of videogame console use in June, and PC gamers played World of Warcraft over four times more than any other PC game, Nielsen reported today as it launched Nielsen GamePlay Metrics, which tracks videogame console usage and games played on PCs, writes MarketingCharts.

Among the GamePlay findings:

• Some 68.1 million individuals used a videogame console in June, playing an average of 7.5 days during the month.
• On the days they played, Xbox 360 users logged an average of 2.2 sessions, with an average session length of 61 minutes.
• PlayStation 3 users logged an average of 1.9 sessions, with an average session length of 83 minutes, on the days they played.

"Ultimately, GamePlay Metrics will establish a metric that can be used for buying and selling dynamic and static advertisements in PC and console videogames," Nielsen said in a statement.

MarketingCharts has more info, including PC-game rankings.