I would agree with this assertion. If TM deliver 50K in 2015 and model X launch is sucessful. Then we should NOT see SP lower than 200 in Q1 2016. But in between, there are still many variables, so I won't be surprised to see SP under 200 or even hit 52-week low in bear attacks.
EDIT: And I should be clear, based on the mere 100 people looking at this forum right now I would take the analysts position as the metric from which TSLA will be measured. So even a guidance miss for the year will not bring the stock below $200 IMO. If they are under 50k, yes, but anything above 50k with good Model X reviews I don't think the stock will be this low.