Google Analytics Reverting Back to Original "Average Time on Site" Calculation

Read this from the Official Google Analytics blog

"We recently introduced a new way of calculating "Average Time on Site" that removed visitors who "bounce" from your website (people who hit one page of your site and then leave). This updated calculation attempted to give you a better idea of how long engaged visitors spend on your website. However, many of you prefer the original calculation: the total time on site for all visits divided by the total number of visits. So today we are changing it back".