Scipy i don't know about Porsches and stuff, but LMPs for example use something close to 1:1 ratio. As i said, dunno about road cars but i'd say it's colse to that too (not so in the double wishbone setup, is so in the MacPhearson strut and trailing arm, that one has a lower ratio since the spring is not mounted on the axle line). And yes, there is a slight angle but once you have angles of 70° (MacPhearson strut) and over, the differences are small. When the spring is at 64° and the force at 90° (or when they are 26° appart, you'll have 90 % of the wheel force acting on the spring (and the 10% acting in some other way, not doing any work on the spring). So it's not so huge. Again, don't know about double wishbone setups as i haven't really seen any up close and personal, but i do know something about leverages and stuff mainly from physics and the other part from mountain bikes (where anturally, the closer you get to 1:1, the nicer the bikes acts when riding over small bumps since the shock is more sensetive to small changes as it's got a long stroke and stuff, also the leverage is important since you get a progresive or regresive suspension. Generally linear or progresive is better since regresive will make it easy to obttom out, but there are other sweetspots and stuff - it really is a science).