Originally Posted by OneTinSloth

right, but one click should always equal one shift. you shouldn't have to overshift in the rear at any point. the front is always going to have a little discrepancy between when the shifter clicks and when the chain actually shifts. but the rear, if properly adjusted, regardless of which system you're using, should shift right on the click. and it should be consistent across the full range of the shifter within the same system. not 1 click here, then 1 1/4 click there, then 1 1/8 click in another place...a properly adjusted rear derailleur will shift at the same point in blah blah blah blah.....