Scarily enough, a lot of people do. They also believe what they read, hence all Audis have lifeless steering, all MX5s are brilliant etc.
Depends on your definition of quicker. On the road there's nothing between them, Zed has more striaghtline grunt but the S2K weighs less so goes round corners better. I've only ever tracked both together one time, which was at Anglesey on the Coastal layout, and there wasn't anything between them. Zed perhaps had better lateral grip, but the S2K was more fun by a fair bit. I tracked my Zed ragtop a fair bit though across UK and Euro circuits, and enjoyed them all.
Zeds slide very well, loads of low down torque to overcome the resistance of the tyres y'see.
this is info i was looking how they compare so even with the extra weight on the zed theres no difference ? as for track and drift days its just for afew days a year .
as for s2 sliding drifting they definately do ive afew friends with the s2k