Comment on Opera Changes Its Mind, Will Use Blink Instead Of WebKit by Pallab

Correct.

Opera was always using Chromium and not WebKit.

It’s built using the open-source Chromium browser as one of its components.

http://techie-buzz.com/browsers/opera-presto-chrome-engine-change.html

http://my.opera.com/ODIN/blog/300-million-users-and-move-to-webkit

Also, Opera was aware of Blink when it announced the change.

http://techie-buzz.com/opera/opera-google-blink-rendering-engine.html