Siri Voice Data Retained?

Apple recently revealed that it stores the voice data used by Siri in its servers for internal imporvement and reasearch!

The voice data is stored for upto two years. Though, the data is unlinked with the user within six months or as soon as the user turns the personal digital assistant off.

Apple also stated that it makes sure that the data is kept anonymously and is linked with the user by a randomly generated key which is nowhere related to either your apple id or your other email id.

With the revealation done, and inspite of knowing that the data is kept anonymously, how many of you are still comfortable in using Siri as carefree as you were using uptil now?