While it's reasonably common for people to drop the g in words such as waiting, hating, and dating, I seem to be stumbling upon a number of Americans additionally drawing out the final syllable of these words. Id est, they pronounce waiting (
/weɪtɪŋ/) as waiteen (
/weɪtiːn/). I find it oddly pleasant and easy on the ear. While I initially suspected this form to be particular to teenagers, I've since also encountered adults employing it.
Is this affectation particular to a region or class of society in the US?