Think back to when you guys first started playing console games. Maybe you were a small child, maybe you still are.
The first games that I ever played as a child, I didn't finish them because I had no concept that games had endings. I know that may sound weird or even silly but it's true. As I got older, I became more involved in the stories but found that the more games I played, the bosses on the final battles of most of these games were too difficult for me to defeat in order to progress and finish the game.
In hindsight, the bosses were stupid easy (Sonic the hedgehog, bowser from Mario brothers, etc.,) but back then I didn't have the tolerance or attention span to sit at a game for hours on end and finish it. The console was just for an hour of entertainment.
I suspect that most gamers are young folks who don't have the attention span, time, concern or care to see a game through. And I suspect that these young people playing today play only for short term gratification, social reasons and recreation.
As JaRDoS mentioned, the response from forum members is skewed because we tend to have more interest in this particular title than the "typical" gamer. I guess that if these young people grow up to be past the age of 18-21, and still game, they'll probably be more likely to see games through versus when they were children or even teens.
Sadly for me, when I was a child and a teen, the 20% stat rang true (actually a bit high) for the games that ended up finishing.
I agree with you here, I remember that I was like this as a kid too. However, here's what doesn't make any sense to me about this, why would they base this pecentage off of kids, when the devs have clearly stated countless times that this game is for adults, and Absolution is a game that has many adult themes in it, and you know that this game will get a Mature rating. So I don't think it's fair to base this percentage off of kids as they aren't even supposed to be playing this game. This rating should be based off of adults, who will be able to understand and follow a story as dark as this one, and might actually be able to invest lots of time into actually completing everything in the missions, rather than the missions themselves. For me, Fallout 3, and games like that, are a blast to play when you get into them. That's why I like Absolution, it has everything I love about video games, freedom of choice in how you want to play. That's what is cool about it. That's why I'm going to be playing A LOT of Hitman Absolution come November 20th.