UPDATE as of 4/8/2013 - 7pm Eastern
Tesla just reversed their pricing decision for those of us who finalized under 2012 pricing with vehicles that are still open to order modifications who wish to add the performance plus package. Previously, Tesla had stated that while they would honor 2012 pricing, the performance plus package would still cost $6,500, effectively asking us to pay for 21" wheels twice (21" wheels were included in the 2012 performance package.) After a bunch of back and forth with Tesla today, I just received verbal and email confirmation that for those of us in this situation that the performance plus package can be added for a discounted price of $3,000. I've added it to my order.
If you're in this situation and had previously been told the plus package would be $6,500 and want the perf plus package, I'd call/email immediately. I'd like to say kudos to Tesla for coming up with a fair solution.
Andrew
Who did you talk to? they are still saying it is $6500 for the performance plus. I finalized under 2012 pricing. I have call four times already and spoke with different agents each time over configurations. They said they have not done any discounted price to anybody.