I have seen this stated multiple times, but I've yet to see any evidence as to its veracity. The notion doesn't even make much sense. Building proprietary or licensed technology into something that is intended to be released to the general public would be completely counter productive--particularly since such technologies tend to come with a suite of tools of their own. The CK is really about manipulating and arranging the various assets available into something that resembles a game.
I expect that the delay is mostly about polish and last minute bug squishing, and there is likely one lonesome dude over at BSG whose responsibility it is to take care of the CK.
Don′t think so. They have a way better workflow if they have their modelling/texturing suites included in the creation kid so they can instantly put new models in game, re-texture in real time etc....
Wait a minute... I got the Collectors Edition, why didn′t I look at the Bonus DVD yet? Todd probably explains that stuff in the Making Of, might check it out.
Also, i don′t think they have only one dude working on the Creation Kit, that thing is something fantastic, and they know we want it.