I think the earnings call will either modestly or significantly reaffirm perception that ramp-up will happen near inevitably, imperfect execution becoming irrelevant (and also inevitable in hindsight).
No way. Tesla shorts are all from Missouri. They don't believe what Tesla management says. At best they think Tesla is playing fast and loose and can't keep all the balls in the air long enough. At worse, they think Elon is playing a shell game and will fail spectacularly. To them, imperfect execution is the tip of the "Tesla is going down" iceberg. They will look at Q3 actual deliveries, not Q4 or 2013 promises. They will look at Q3 revenue, not Q4 or 2013 profit margins. They will look at cancellations, not increases in reservations. They are all saying: "Show me, dont promise."
Basically, I don't think there will be anything in the Q3 shareholder letter or conference call to make a Missouri Short change his or her mind.
I'm invested in Tesla on the long side, but let's play Devil's advocate:
Tesla: "Model S is winning awards."
Short: "Chevy Volt won Automobile car of the year in 2011, and it's been a consistent money loser for GM."
Tesla: "We successfully raised cash in Q3."
Short: "Yeah, and you're going to need even more since you're not delivering enough cars."
Tesla: "Superchargers across the country."
Short: "That's going to cost you money you don't have to build, maintain, and power these things."
Tesla: "People getting their cars love them."
Short: "Yeah, all 249 of them."
Tesla: "We will produce 20K cars in 2013."
Short: "You couldn't even make your reduced shipment guidance for Q3."
Tesla: "Reservations are at their highest rate ever."
Short: "So are cancellations."
You get the idea. To the Shorts, it's all promises and futures and Tesla hasn't been all that great at keeping them in the past.
I'm not selling today in anticipation of buying back after the announcement, but I certainly won't be buying more before the announcement. (Of course that means now really is the best time to buy, since I'm usually wrong).