This line alone makes me want to call BS on the whole lot. Would make the game unplayable. Smells like something made up by an enthusiastic fanboy trying to mix in elements of Hitman, without thinking things through.
He did say 24 in-game hours, not 24 real-time hours. It wouldn't take long to pass, especially if GTA 5 follows suit with it's predecessors in that you can go to sleep and fast-forward the clock 6 hours or however many it was.
This isn't me saying I believe all the stuff this guy leaked however. I saw that it was in-game hours and it would still be unplayable, in the sense most people would find it so annoying they'd just put it down. For previous games you've had to save at the safe house like 3 or 4 times to even advance the game 24 hours, which would be a stupid requirement just to wash your wanted slate clean. Assuming you don't do that and just carry on playing after your 4-star+ rating, that's like an hour or so in real time for the gameworld to run its daily cycle, during which any cop in the game is going to come after you on sight. Even if they only come back after you on a 1-star level it would make the simplest journey into an enormous headache. Then it says that 5 star and higher have even longer requirements for evasion. Unless there are massive changes to the evasion system I just find it too silly to believe.
It doesn't even make much sense from a game-logic standpoint. 'Searching for someone matching your description' is what the cops do when you're Wanted. But in GTA5 they still do it when you're no longer Wanted?? I smell a fish stench unless Rockstar are smoking the funny stuff and want to play at making a Hitman game.