Definitely starting with positive areas of development is very helpful, not just when discussing delays but in all interactions with parents. Having a well documented record of observations and having that backed up by what is the developmental range is also important, so that the discussion stays rooted in facts, not opinions or feelings of the provider. I have a son who is atypical and as an educator I brought my concerns to the teachers and they concurred. He received early interventions and is now doing well in middle school. The earlier the interventions the better, so the day care centers are most likely to be the first place where delays will be observed. No pressure.