JUCO is a different animal when compared to kids who go to 4-year schools. By definition, it is a one or two year program with a goal of competing to open a door to finishing up at a 4-year school. Roster spots are a continuous churn of guys moving up or out, other guys dropping down from failures at 4-year schools, and so on. It is much more practical for JUCOs to keep their roster sizes down to a manageable number. And like all levels, the better programs do not need to inflate their rosters because they always can attract top players to their programs.
Again, for those still on the recruiting trek, now is the time many schools are in Fall preseason and many schools do post their "tentative" rosters. Save a copy of those rosters because they will decline by the time Spring season rolls around and they are updated. Look at the kids who are no longer on the list and ask yourself questions about who got cut, such as were they at the school last year and years before, did they play much (check Stats usually archived), how many kids kept are transfers in, and so on. You can get a real read of a program and a coach's methods by looking at the rosters on a regular basis.
EDIT: Thanks Cabbage...autotype is never good for me!