And 90+ % in SG won is INSANELY high. To me, Fed is one of the best servers ever on hard. Players who got 90% + SG won on hard court for most seasons:
1- 9 times: KARLOVIC (2007, 2008, 2009, 2010, 2011, 2013, 2014, 2015, 2016) and FEDERER (2004, 2005, 2006, 2007, 2012, 2014, 2015, 2017, 2018)
3- 8 times: ISNER (2010, 2011, 2013, 2014, 2015, 2016, 2017, 2018) and RODDICK (2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010)
5- 7 times: SAMPRAS (1991, 1993, 1995, 1996, 1997, 1999, 2000)
6- 5 times: RAONIC (2011, 2012, 2013, 2015, 2016)
7- twice: KYRGIOS (2017, 2018)
Anderson, Tsonga, Johansson, Agassi and Rusedski have managed it once in their career. Nadal and Djoko, never. The end.
So, Fed doesn't servebot??? Look at the company he keeps. I beg to differ.