I wouldn't worry about it, blue smoke happens to all new motors. The reason you don't usually see it, it because they do not have enough flow to make the smoke noticable.
To prove it just go ask any Cobra owner or even classic muscle big block owners. If they paid attention they will have noticed it.
I have three friends that all own Cobras(one is on his second) and it has been pointed out to all of them. It is most noticeable(sp?) when the engine is cold and has just been started. Usually goes away after 500-1000 miles.
Hope this eases your concerns.
