Originally Posted by
noglider
People who have only ridden bikes with dual pivots or V brakes will try old brakes and say they "don't work" but it's because they're not used to squeezing hard enough. Not everyone is strong enough. If you're strong enough and don't mind squeezing hard, the 605s will be fine.
Not just a matter of MA. The long distance from pivot to pad on single-pivot brakes results in lots of flex if the arms aren't made heavy and stiff (or very short, severely limiting clearance). Oftentimes the modulation is spongy and regressive as a result.