From the manufacturer's standpoint a longer cable is in fact more universal but
from an end users standpoint I think they are a little long too...but in the end I guess it is better to have a foot too much cable than a foot too little.....It would be nice if the end that goes into the throttle could have a removable piece (similar to the little brass thing that screws onto the clutch cable) so that the end user can cut the cable to fit then simply screw on the little end and put it in the twist throttle.
oops. i didnt understand the poll question. i thought the subject was what is the common problem we see with them. mine always seem about 3" too long. too long sux (not as much as not long enuff, obviously) because there's more loops and bends and angles that stress the cable out