I learned that it's not wise to enter the pits of hell with only a dagger and cloth armor, so yes, you can learn from video games.
Seriously, it's not the video games per se, that raise their IQ, it's that fact that they have to make some type of analytical decisions in the course of their gaming. They could accomplish this by playing any number of board games also (which would also improve their communication and social skills).
If a parent would take the time to play games like Monopoly, Risk or even card games with their kids, they would learn more (and more quickly) than if they just plunk them in front of a computer or console system.
When I was young there was no internet. We had to blow stuff up the real way.