Human factor is the element that produces more deviations in the costs of information technology (IT) projects. Recently, a gap between the competences required from the IT industry and the competences taught in the computer science university degrees has been proposed as a possible explanation to it. This paper further investigates this issue following several steps. First, through a questionnaire administered to different groups of computer science students, it analyses their performance according to a set of professional competences. Then, it addresses the evolution of the students' competences from the beginning of their studies until the end. Finally, it determines the matching of the students' competences with their personal characteristics at the moment they select their major. The results obtained permit recruiting staff to identify competence stereotypes in students and their evolution as well as comparing them with studies of competence requirements included in recent curricular efforts, so that they can act accordingly.