You are probably correct.
OTOH, nobody has a strong low serve..
One of my buds at Albert'sField in Marin is 6'2" and hits a hard sidespin serve with some backspin component, so it skids around lower thigh high. I just slice it back to his backhand. This guy is #5 on the team, which is the winning 4.0 team in California two years ago.
I do have trouble with one of my practice partner's forehand. He hits it sidespin, REALLY hard, and the ball skids just below my knees. I cannot hit a neutralizing or offensive shot against it. OTOH, neither can the 5.5 we were hitting against.