I'm generally agnostic -- or, rather, extremely bi-polar -- about Wild Turkey products. I adore the defunct 12yo, export-only 8yo, and Tribute, and think the standard 101-proof (and even the 80-proof) are very fine examples of archetypal bourbon. However, I don't understand anyone's fascination with Rare Breed or Russell's Reserve (either the 101 or newer 90). The 101 rye's a steal.
So, I come to the new American Spirit 15yo with no pre-conceived notions -- I'll either like it or I won't.
Nose: The nose is a disappointment. It begins a bit manure-ish, with some leather and, eventually, a tinge of orange peel. Considering its opening, its subtlety is its best feature.
Palate: As noted in an earlier response to Mike, the taste progression here is backward, at least according to expectation: it opens pretty dry and leathery-sour, but sweetens at mid-palate and displays some sweet orange prior to swallow. Some 'chewing' suffuses the mouth with a very nice, oily mouthfeel, blending the flavor elements in an interesting cacophony of sweet & sour mix.
Finish: As 'minty' as any Wild Turkey I can remember, its power diminishes apace, but lingers on in hints of orange and leather. Call it medium.
Overall: I like it. I won't pay $88 for it again for personal consumption. Worth a taste, though, if only to broaden one's WT horizon.