The company also said that it believes the number of high-intensity users will grow 40% by 2007, and that the most popular titles are "low-intensity puzzle and board games".
Other statistics that Jupiter found:
-The median age of gamers is 23 years old
-61% of those surveyed cited "low-intensity puzzle and board games" as their favorite genre
-One in ten online adults owns a current generation console (defined as a PS2, Xbox or Gamecube)
-The overall audience of gamers across all platforms will grow 18%, with a 61% penetration by 2007.
-Revenues for the PC and console games market will break the $14 billion mark in 2007, up from $11 billion this year
-The number of gamers that play more than 15 hours per week will grow by 40% from 12 million to 17 million by 2007
Jupiter is releasing two reports, "Audience Benchmark: Adult Video Game Adoption, Cross-Ownership and Usage" and "Market Forecast: Assessing Growth of Games Audience and Revenue", which can be purchased on the company's web site