6. The "folksy" element she injects into her speeches is fake (or at a minimum, greatly over-exaggerated).
I was flipping channels the other night when I caught a segment on The Rachel Maddow Show (MSNBC) that touched on this. She argued that, for all of the "you betcha," "hockey mom," "doggone," winks and so on that she uses, one moment of real insincerity can erase all of that. Watch how she responds in the clip below of Biden choking up while talking about losing his wife and daughter. Before launching into a canned "maverick" answer you can even hear her make a "tsk" noise. For someone so "hockey mom next door married to joe sixpack and another member of the middle class just like you," she could have mustered up respond that implied she had at least a little sympathy for Joe.
Biden Chokes Up Recalling Family History during VP debate.