It illustrates the lunacy of paying huge premiums early in the game...
But LONG TERM, I don't think there's going to be "too many" special models built on this platform. Just look at how many different things Ford and Shelby punted to the public in the late 60's..
Shelby GT350, then GT500, then convertibles were available, then GT500KR...
Then Ford tosses in with the Boss 302, Boss 429, Boss 351...
You add 'em all up, and alot of "special" cars were floated between 65-71. Today, they are ALL worth small fortunes.
I don't think you can go wrong with any of the cars coming out right now, as long as you have the calmness of nerve to wait-out initial poaching post-sticker premiums.
I agree with your point that the Shelby GT takes some luster off the GT500 being a "real Shelby", despite the GT500 being able to run circles around the Shelby GT.
If you take a historical perspective, I liken the new GT500 to the '68 GT500KR. Big power, alot of unique cosmetic changes to the nose and tail, and pretty-much a Ford-developed car with Shelby's name plunked on it.
The new Shelby GT is like the '66 GT350. Similar in the extent of visual mods, and similar in the extant of engine/chassis mods.
In collector markets, the '66 GT350 and the '68 GT500KR bring very similar values, despite the fact that the former is more "true Shelby" than the latter, and despite the fact that the latter is far faster than the former.