A 10k wide guidance is not exactly good forecasting. They have known Model X orders to work down, they know the take rate and incentive deltas in various countries and know the # of sales per store in most areas. It should be possible to do a solid 5k wide guidance right now and be correct. My 2014 guess here on TMC was within 20 of the year's sales. My 2015 guess was short by about 2k due to the push into Denmark and extra selling into China that I didn't factor in along with 1400 supposed falling into January of 2015 from 2014.. If I can get this close for two years, from the outside, why can't Tesla do a true guidance to start the year? Both 2014 and 2015, they had to lower guidance during the years but waited until well late in the year to do it. It seems a higher guidance is meant to look better to the stock market and to make headline news which itself is a form of free advertising.
Beating guidance is an end of year thing and short-lived. But forecasting better guidance than will be hit is a year-long benefit. In a growth company, you should always be trying to look good to start the year to make sure that people interested in buying product are not scared away. I predict that guidance is: "we aspire to deliver 75,000-80,000 during 2016". It's possible to hit that but will take work and another good stock market year to pull it off. They already have stated "50% growth annually for years to come". So, at least guidance has to be close to that.