paulkva
part of the supercharge.info dev team
I don't know about irrefutable (that's pretty definitive...), but there's no question that charge time is one of the two major concerns of prospective EV buyers. I believe that when it comes to mass adoption of EVs, charge time (and range) must be addressed...and not just with trade studies and math but at some more rudimentary level that appeals to the not-completely-logical mass market.
I simply tell people who ask about charge time that I never have to wait for my car when charging. Always true for me at home (overnight charging), and nearly always true on my trips (car is typically ready to keep going before the passengers are). Once I tell them where I've driven it, and add a little bit more detail, their eyes typically go wide.
At that point the only charge time argument I can't refute is for those who can't charge at home. Even if they live near a supercharger, it's generally less convenient than gas for them, and I'll concede that point.