I would.....the first step with most kids is knowing they can go in the potty. the next step is realizing they can go when they want, and the next step is knowing the feeling they have when they have to go. then they are done! The biggest growth in self esteem is seen when kids master the potty, maybe you can give the parents a comment of such nature, to push them to push him to grow his self esteem. Kids are so proud of themselves and it seems the turning point from toddler to big kid.....what kid doesn't want to be reffered to as a "big kid!"