No, it's generally not accurate to say that metal roofs leak more than asphalt shingle roofs. Both types of roofs can be properly installed and maintained to be relatively leak-resistant. However, it's also true that any roof can potentially develop leaks, regardless of the material used. Factors that can affect the likelihood of a roof leaking include the quality of the installation, the materials used, the local climate and weather conditions, and the level of maintenance the roof has received. If you're concerned about the potential for leaks on your roof, it's a good idea to have a professional roofing contractor inspect it and advise you on any necessary repairs or maintenance.