Here is one I found, just refers to their use as 'starts at age 3 to use some adjectives and adverbs'; what sorts of adverbs is your dd using? I mean there's 'very' and then there's 'accidentally' or 'smoothly' at the other end of the spectrum. I don't think most kids are using 'eventually' at age 3...
http://www.healthychild.net/articles/mc37develop.htmlThis one mentions adverbs at the 60 month milestone, and in general is a pretty interesting list.
http://www.childdevelopmentinfo.com/development/language_development.shtmlAnd for good measure, some adverbs...
http://www.paulnoll.com/Books/Clear-English/English-adverbs.html