It seems the info was lost in translation. The 25 hour figure was put together by the Italian site - and is not a figure Rockstar gave.
This piece of info caused a lot of discussion yesterday in this thread, which I have since edited at the top: http://www.gtaforums...howtopic=532774
I have now fact checked with someone much closer to the project to make sure the most accurate information is put out there, and updated the GTAV.net article. Here is the revised point:
|The game is roughly the length of Red Dead Redemption in the time it takes to fully complete. For those who didn't play Red Dead, it was packed full of a lot of extra content, separate from the main storyline. These included things like the Stranger Missions, side activities, and the 50 unique world events (dynamic missions). GTAV has similar versions of this content in its world, specifically with the unique world events and "random character encounters".|
So to reiterate, it does not take 25 hours specifically to complete. As members have mentioned in the aforementioned thread to those who were concerned, open world games can take differing times to complete between different players. In a world like GTAV, where there is so much more to do and explore, I suspect it'll take even longer than games like GTAIV where there wasn't many other interesting things to do or to mess about with in free mode.
Still, not sure why some people complained about the 25 hour speculated number. This is a lot more than most AAA titles out there today. But anyway, I hope this provided a bit more clarity, and I promise to fact check any new information that come via translated previews from here on out. Everything else in that article is entirely accurate.