"Y’all are thinkin fo yaselves"

Has anyone else noticed that Obama has lost just about every element of professionalism in his public speaking.  He has gone from sounding like a well educated politician to some community organizer/southern gospel preacher.  His cadence is the same....he just slurs more words and leaves the ending off of them.  It is like he is hoping to get an "amen" from the listeners.  Maybe this is what gives Chris Matthews the shivers?

Speech from campaign trail: http://www.youtube.com/watch?v=DMbBuEoEYnk

Speech this week:  http://www.youtube.com/watch?v=IvbWfETy8QA