Actually 40-year-old Moms are not hardcore gamers at all. In fact the beauty of Zynga is that it went to the basics. Most people are actually not hardcore gamers. Rather they simple want basic games. These are the 40-year-old moms where the amount of technology they want to digest is limited. While Zynga has room to grow in technology, their success lies on everyone not being hardcore and rather simply willing to spend a few minutes every day playing a game.
They're hardly new hardcore gamers, as anyone who's played Gin on Pogo.com in the last ten years knows.