Tesla's CEO, Elon Musk, has been the focus of many headlines lately due to a certain, well-documented kerfuffle with The New York Times. Today, however, the automotive company's chief isn't questioning any reviews. Instead, he's taken to the Advanced Research Projects Agency for Energy summit to share his belief that Tesla Motors will pay off that $465 million loan from the US Department of Energy well ahead of when it's expected to -- in five years, rather than ten,
