2008 and on C2 manual is 1415kg DIN, Cayman manual is 1330kg DIN. S models are about 20kg more, and then another 30kg if you go PDK. Not to mention the extra weight all the options make: The adaptive sports seats (which I've got) weigh about the same as a teenager each! Trust me, these cars are not going to be far off the weight of a Zed when they come to the market.
The Zeds could've been a lot lighter, but then they would've cost a lot more. They might've been able to knock 100kgs off the weight at the cost of another £10K on RRP, and I know which I'd prefer.