A couple corrections:Check the Tesla Website. If there are about 34-37 founders series, then there have been about 40 signature special deliveries.
1. I thought there were 41 founders. So.. 74-41... 33 SSL.
2. "successfully manufactured our 100th production Model S, of which 74 are for delivery to our first reservation holders" This doesn't mean delivered. This means "intended for delivery."
In short, at most 33 SSLs have been delivered, but it's likely less than that have actually been handed over to owners.