Ripening an Avocado in just 10 minutes time can be done and I've done it myself.
The way you ripen the Avocado in only 10 minutes is to preheat an oven to 200 F and then while the oven is heating up you wrap the Avocados in some tinfoil and then place the Avocados in a baking dish.
Then place the baking dish with the Avocados into the oven for 10 minutes and they will ripen within the 10 minutes they're in the oven.
The reason Avocados ripen in the oven in 10 minutes is the heat of the oven causes the Avocados to release ethylene gas, which ultimately promotes the ripening of the Avocados in only 10 minutes.
I do it all the time when I need to ripen Avocados and it really does work like they say it does.