Federer played Hewitt and Grosjean in the QF and SF. Roddick played Schalken and then Ancic. The apparent ease with which Federer beat Hewitt and Grosjean isn't the point. The point is Hewitt and Grosjean are much better players than Schalken and Ancic.
Fed 2010: Federer aged 28 16 Slams(inc. career slam) vs Sampras aged 28 14 Slams(no FO)