Developmentally Appropriate Practice simply means providing activities that are appropriate for a certain child's level of development. The philosophy of DAP is that we look at the individual, at their development. I agree that usually in early childhood worksheets are not appropriate, but not always.
Some children are ready to move on to abstract concepts and actually enjoy worksheets very much.
I teach kindergarten and rarely use them, but in early childhood, we're talking about children to age 8, and at that level of development, they are much different than my kinders. Well, just my opinion.