single pivot without a shock with a good pedal platform will bob like crazy, also without a floating brake you'll be getting brake jack galore. So yes, a suspension system with more than one pivot is superior.
well i'd imagine that with a single, their would be more stress on it, but with a double it would be spread out, but it would just be one more thing that could break.
My commencal supreme DH has quite the brake jack effect but im gonna make myself a floating brake for it, i found that (even tho it is essentialy a single pivot) it just shoots you out of a curve. And pedal "kick back" well.... if your standing on the bike the bike is then kinda pushing itself foward from suspension use
i used to have FSR link and discovered that i very much preffered the verymuch tighter feel of the single pivot
Santa Cruz bullet / Orange = Single pivot ( sucks, unless you have a good shock) Norco/ Kona / Specialized = four bar linkage ( slighttly better, but still so 1999) Giant / Intense / Santa Cruz v10 / Iron Horse Sunday = Virtual in some shape or form. Which is the best.