This paper aims to analyze the state-of-the-art of technology acceptance research in the area of mobile services concerning rigor and relevance as well as concerning the scientific approach that is used based on a full text analysis. The results show the current dominance of rigor over relevance and of Behavioral Science over Design Science but also offer opportunities to enhance research quality as a whole by including Design Science principles in this research area that is usually seen as a typical domain for Behavioral Science.