The recruiting process can blow hot and cold. First school to contact my son his junior year invited him to a game and campus visit, then acted like they couldn't remember his name when he got there. A few weeks later, they loved him again. They finally made him an offer later in his junior year, and then hung up on him when he told them he was going to a different school.
Don't put all your eggs in one basket and don't feel like you have to commit to the first school that offers. Sure, keep talking to these guys, but definitely keep exploring other options and expanding the list of schools you talk to. Always remember the schools are in it for themselves, you (and your son) need to do what's best for you.