In a tweet this week, Tesla (NASDAQ: TSLA) CEO Elon Musk all but confirmed that demand for its vehicles remains through the roof. This way, if Tesla does ramp up supply significantly in the coming quarters we can rest assured that there's likely plenty of demand for increased production volume to grow into. In response to a Tesla fan on Twitter who thanked Musk for Tesla stock's staggering performance recently, the CEO took the opportunity to emphasize that Hertz' (OTC: HTZG.Q) recent announcement about its plans to order 100,000 Tesla vehicles by the end of 2022 wasn't some special contract of sorts.