Its true- look at the proof, the head to head records-
vs ~Del Potro-
http://www.atpworldtour.com/Players/...=F401&oId=D683
Vs Berdych-
http://www.atpworldtour.com/Players/...=F401&oId=BA47
Vs Tsonga-
http://www.atpworldtour.com/Players/...=F401&oId=T786
The results are indisputable, and speak for themselves. Watch Ferrer vs Berdych in Abu Dhabi 2012 for some aggressive tennis from Ferrer, who doesnt get his due on this forum. He can be aggressive, and despite claims to the contrary, he has a powerful forehand which is among the most accurate on tour. Also his serve is great and very consistent- he served something like 15 aces in his match vs Almagro in AO.