I got something interesting to share with you. So, while doing the missions in GTA IV, I got some evidence regarding existence of Bullworth Academy and Jimmy Hopkins in the game. So we all know that ped that resembles Jimmy exist in the game( A tv ad about Bullworth too). But when I was doing the mission Blow Your Cover, in the cutscene I saw a ped dancing in the background that looks like Jimmy.
On second note...In the mission Easy Fare, while talking to Jermaine Niko mentions a school for sick kids. What I think that the school he mentioned might be Bullworth Academy( as there are nerds in that school).
So I think there are many strong points that this is a pure easter egg(not small). What you guys think???