1). Duke as a university tends to care very little about standardized test scores (look at Duke med, Fuqua, etc.) so claiming that Duke is “notorious” for doing that tells me that you are misinformed. Also, it would be prudent to refrain from making assertions that you cannot back up.
2). Standardized test scores are probably more informative than GPAs because they are STANDARDIZED.
3). Do you really think that Duke’s GPA range is lower than Berkeley’s? Seems highly improbable but I can’t find data on Duke’s GPA range.