To simply lump all Hitec digital servos into one catagory and to immediately say the servos are no good is very shortsided.
Here's some interesting reading.... while is it targeted to the car guys it still applies to the aircraft market as well.
http://www.hitecrcd.com/servotech/performance.htm
Here's some other interesting reading as well...
http://www.rcuniverse.com/forum/m_3597179/tm.htm
I'm still here to help if anyone wants it... I'll keep my body armor on though!
Mike.