The thousands of fake accounts and "likes" in FB or the thousands fake accounts of "followers" in twitter?..
Of course not. Read the scientific papers. Even the non-search industry scientists, the ones focused on data mining, dismiss metrics such as followers because they're too easy to game. The research papers I've read about data mining Twitter note that they're looking for signals related to influence, and the amount of followers are not a signal of influence. Regarding Facebook Likes, that was dismissed already by Matt Cutts himself at SMX.