NEW DELHI, India - Age has slowed Michael Schumacher, according to his fellow-countryman and former rival Heinz-Harald Frentzen.Early in their motor racing careers, it was the now 44-year-old Frentzen who was considered the quicker of the pair, but Schumacher went on to dizzy heights in F1 while the other German retired in 2003 with just three wins.'YOU HESITATE'Schumacher, 43 in January 2012, retired three years later than Frentzen but returned in 2010 to drive for the Mercedes F1 team where, in two seasons so far, he has failed to add a podium place to his tally of 91 wins and seven World titles."As you grow older," Frentzen explained to the Indo Asian News Service, "you tend to hesitate and become indecisive on whether to push and take risks."You lose precious tenths of a second. I think Michael is at that stage."