In this response to "Measuring Students' Writing Ability on a Computer Analytic Developmental Scale: An Exploratory Validity Study," the authors agree that assessments should seek parsimony in both theory and application wherever possible. Doing so allows maximal dissemination and implementation while minimizing costs. The Writing Ability Developmental Scale may indeed provide educators with an efficient, cost-effective alternative to more costly efforts relying on human raters. However, the authors of this response agree that the study is "exploratory" and the Writing Ability Developmental Scale is not yet ready for "prime time" for a number of reasons. In this response, the authors raise concerns and caveats, which they hope will help the researchers fine-tune their initial efforts, as well as offering cautions to practicing educators who may use the Writing Ability Developmental Scale.