ORIGINAL: c/f
As I understand it, mass balancing to 100% could cause more problems, bear with me.
If the control surface is neutralized by static balance then the servo which has zero torq available in the nuetral position would be throwing the load back and forth thus spiking servo motor amperages +/-. This in effect would be a micro flutter already setup.
My understanding could however be flawed since I buy into the digital servo OEM hype that it takes a movement off of center to develop servo torq, and digitals develop the torq closer to center than do the others.
This has been known to happen, but usually on large surfaces, like full flying stabs, as the polar moment of inertia is high.
Be aware that as we have seen higher and higher performance servos, we are seeing a SYSTEM limitation due to the fact that the gain settings in the servo cannot be adjusted. This is usually apparent on the flying stabs, I have never seen it even on heavy mass balanced elevators. We had one of the highest performance digital servos (big Volz) that was unusable on a big UAV as we could not adjust one of the gain settings in the servo controllwer software.