I think I found proof that overbuff isn't accurate - General Discussion - Overwatch Forums
i think overbuff might be broken... - Imgur
Lucio Stats from Overbuff - Album on Imgur
Fortbuff: A New World Awaits! - Overbuff - Overwatch Statistics
Tier list in competitive, according to Overbuff (as of mid-Jan 2017). So many DPS and only 1 reasonably played. | Overwatch | Know Your Meme
Overbuff on Twitter: "@kozmic_khaleesi We show you how your stats compare to other Overbuff users on a percentile. In short, the more full the bars, the better. ;)" / Twitter