Check it out for yourself:
http://www.teslamotors.com/true-cost-of-ownership
Any reasonable person would see that page and think they can get a Tesla for $601 per month. But that's the "Effective Monthly Cost". The actual monthly cost for the lowest cost model is $980 per month for a 6 year loan. Seriously, a 6 year loan?
Honestly, they don't even need to do this. The people buying a Tesla now aren't shopping for a car strictly on price and they're smart enough to not be fooled by such gimmicks.