"Well" is the adverb that describes doing, "good" is the adjective that describes the noun (you).Merriam-Webster's Dictionary of English Usage also takes issue with this assertion. Both "well" and "good", it says, have long been used adverbially, although it notes that "good" is primarily used adverbially in speech.
(Western US.)
posted by mollymayhem at 6:01 PM on October 9, 2011 [2 favorites]