I'm a little disappointed about this in a way. My rank 180 is actually 100% legit before people say anything. Anyway, people who have 250+ are pretty much always DNS people. I used that knowledge to my advantage to pick out targets in lobbies because people who used DNS servers are tools. Oh well, I guess there will be less tanks around so not as many people will be extremely butthurt about tanks. Personally I love tank users because they always call up new tanks to try to shoot down my jet and they're so stupid and never learn that a good jet pilot always beats a tank.
I wouldn't be so quick to make that assumption. My character was created October first at 2 am PST (early launch) and that character is a level 314 with 47 days of game play. I'm been in 1,689 races, 591 death matches, killed 8, 684 players. I've driven enough miles in the game (13,668 miles) to have driven over half way around the world (the real one, Earth). And since the beginning of the year I really haven't been playing GTA as much. So realistically there is easily legitimate level 400's and higher.