I suspect you're spot on with this. Being that all I have is a 6" do-it-all I think it's awesome.Me too. I think it depends on the kind of bike you're using it on. A short travel 29er? Gimmick. A 6-inch travel trail bike? Awesome.
Of course I used to f**k with seat height on my old 3" FS XC bike too... so maybe we're wrong.