A Professor of the New Testament Robert M. Grant says "Luke evidently regarded himself as a historian, but many questions can be raised in regard to the reliability of his history His ‘statistics’ are impossible; Peter could not have addressed three thousand hearers without a microphone, and since the population of Jerusalem was about 25–30,000, Christians cannot have numbered five thousand ."
Profesor Perjanjian Baru Robert M. Grant mengatakan "Lukas jelas menganggap diri sebagai sejarawan, tetapi banyak pertanyaan muncul mengenai keandalan catatannya ‘Statistika’ yang ditulisnya tidak masuk akal; Petrus tidak mungkin berbicara kepada 3000 pendengar tanpa mikrofon, dan karena populasi Yerusalem waktu itu sekitar 25–30.000, orang Kristen tidak mungkin berjumlah 5.000 jiwa ."