We would've won for sure in 2012. Up 3-2 after Paul Pierce's classic "in-your-face" 3-pointer against LeBron James at American Airlines Arena (as my sig below is stated), the Celtics could have taken care of business in Game 6 with Brad Stevens.
If not, CBS would have adjusted hard for Game 7. Then this old-washed up Celtics team would have given Durant/Westbrook/Harden some fits in the Finals.