You should definitely contact him, unless you would be willing to quit almost right away if they start jerking you around somehow; which I don't think would be

You should definitely contact him, unless you would be willing to quit almost right away if they start jerking you around somehow; which I don't think would be a good idea. Several commenters have said you should take what he says with a grain of salt; You should take anything anybody says with a grain of salt, even if you think they are being completely aboveboard, you could be wrong, and you don't know what kinds of incentives and conflicts may be influencing them. And you should be alert for honest misunderstandings as well.