I think that the XL1's DSG is not the same run-of-the-mill DSG found in other production cars, but is fine-tuned to help the XL1 be even more efficient. I'm thinking that the penalty is much less than 0.5hp and 20kg.
Still, for the average Joe, having a 20kg DSG may be better than having an 80kg hypermiler drive him around everywhere
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e·co·mod·ding: the art of turning vehicles into what they should be
What matters is
where you're going, not
how fast.
"... we humans tend to screw up everything that's good enough as it is...or everything that we're attracted to, we love to go and defile it." - Chris Cornell
[Old] Piwoslaw's Peugeot 307sw modding thread