content: As fast as they can build/acquire the infrastructure to create the assembly line and begin the process.  The real question is how many of the 253k pre-orders will be fulfilled once production is underway.  I estimate that out of the 253k, about 30% will not follow through with that order.  That's more of my optimistic side speaking as i do want to see a transition to electric cars happen even if it is via the overblown "Apple style" hop on the bandwagon way.