Does the number of Twitter followers have predictive value?

Below are the Twitter follower tallies for some names in the news. Does a high number of Twitter followers predict an election win? And for celebrities, is the Twitter count a “market quote” for endorsements?

# # #

Chris Christie 134,755
Paul Ryan 195,632
Bruce Springsteen 251,558
Sarah Palin 817,362
Mitt Romney 854,919
Jeremy Lin 879,625
Tim Tebow 1,808,667
Barack Obama 18,565,514
Lady Gaga 28,397,806