The paper presents some of the results of an empirical research conducted with the purpose of contributing to the elaboration of a PhD dissertation at the University of Sao Paulo. The objective of the research was to study how some of the characteristics of the Project Manager (PM) and of the project teams influence the performance of Information Technology (IT) Projects at different levels of organizational project management maturity. Shenar´s proposals for project performance evaluation, a combination of the CMM (Capability Maturity Model) and the PMBOK project processes, were used as conceptual references. After sending more than 4000 questionnaires, it was possible to establish a sample of 130 cases that was used to perform the research. The data was analyzed using multivariate analysis techniques, like factor analysis, multiple correlation and canonical correlation analysis. Among other findings, the results of the study suggest that there is a stronger association between the profile of the PM and the satisfaction of the client organization than between the PM profile and the time and costs targets. It was also found that this last mentioned fact is more intensively perceived in organizations that present a higher maturity level to manage projects. But the other side the characteristics of the project team seem to always influence client satisfaction, independently of the level of maturity of the executing organization.