Don't worry about what other do, just do your thing. I've had potential clients looking for everything from free play all day to structured 24/7. Simply state in your adds what you provide (and why) and you will find the parents who are looking for the same thing. Show off why you believe you are better without commenting specifically on others. For example, I offer a preschool program that helps children develop.... That way you are promoting yourself, not bashing others.