I think what is important to keep in mind are the market conditions.
What I mean is that on the weekend a lot of BOC coins and notes were sold at the show -- then more sold at the auction. There is only a finite amount of buyers with a finite amount of money. One has to ask oneself: what can the market reasonably bear?
The fact that a multicolor specimen set went for well under book might not necessarily mean that Charlton's has the value inflated (sure it could) but it may also mean that the present interest in MC notes has waned, or that in light of the fact that the 54 rarer series were offered at that particular auction, (and sold many times over book) tapped out a potential buyer for the other MC series.
In all likelihood: some very good deals could have been had at either the auction or the show. This would depend (of course) on the condition of the goods sold. Brent's point that the notes were generally over-graded also has some bearing on how the TNS auction would pan out.
I think its wise to keep in mind that there is a certain kind of "market" at each event (even though eBay does broaden the market of the TNS auction there's still plenty of eBayers who are auction shy). There's been a lot of press about the surcharges (tax, auctioneer's fees, etc...) that add 30% your final bid. That -- and the contention of a note's grade -- could turn off a lot of buyers.
There is a different market at the show. A lot of buyers prefer the laid back (no pressure) situation at the show...where a price can be haggled at.
We also have discussed how many dealers (with few exceptions: Don, Colonial Acres, etc) are prone to turn their nose up at new notes.
Its a "Seller's" market for UNC/rare/specimens/ and nice pre-37 notes while it can still be a "buyer's" market for Journey, EF to AU, and world notes.
So many of the experts (ie CCN) advise collectors to buy "what you want" when it might be wiser to buy "what has potential" or "what isn't popular at the present moment."
I think it would be accurate to assume there will be another increase in the Charlton book value of most notes. Perhaps it is a bit over-inflated. These things go in cycles. There may be a "cooling down" period or cycle to follow.
Whether it will be 2007 is anyone's guess.