Insert the following into google and do a search: todd howard skyrim game engine. You will see 47,000 entries with Todd going on about how they created a whole new engine for Skyrim. Most of us knew it was still Gamebryo though, since prior to announcing Skyrim, they stated that their next project would be using a heavily modified version of Gamebryo. Todd then decided that it was good marketing to call it a new engine, since people had a lot of issues with Gamebryo.
That being said, I do love Skyrim, and think they did an amazing job working with the old as hell tech they had to work with. The looks stunning in spots, but it also looks quite ugly in others. I don't want to sound too negative, but I really don't like being lied to and misled. Imo that is false advertising. Anyone who played or followed a Codemasters game called Dragon Rising knows why I would be p!ssed about that....
http://www.youtube.com/watch?v=2eokdHSzhAY
Watch this.
He basically admits that they start off with the fallout 3 engine and start re-writing from there...after re-writing more than they originally than they wanted to they just went ahead and renamed/branded it their own. Watch from 2:50 -3:58ish. How many times does he say re-written? It's Fallout 3's engine re-written and then dubben creation engine. It's not new. I guess if you re-write something so much...it's new? Or is it a heavily modded Fallout 3 engine? Take your pick.
You wanted a quote, I found you a video (so I can't mis-quote anything).