The DNC was not aimed toward hardcore Republicans, so the fact that you didn't like it doesn't mean much of anything. In fact, I'm sure you decided that you wouldn't like it before you watched it.
No, it was aimed at hardcore Democrats, and didn't really do anything to appeal to anyone else (as I said at the time).
Sorry, they were declining until the DNC:
Wednesday - August 27, 2008:
General: Head-to-Head
McCain: 44% / 47%, including leaners (NC, +1)
Obama: 44% / 46%, including leaners (NC, NC)
Tuesday - August 26, 2008:
General: Head-to-Head
Obama: 44% / 46%, including leaners (-2, -2)
McCain: 44% / 46%, including leaners (+2, +1)
Monday - August 25, 2008:
General: Head-to-Head
Obama: 46% / 48%, including leaners (nc, nc)
McCain: 42% / 45%, including leaners (-1, nc)
Sunday - August 24, 2008:
General: Head-to-Head
Obama: 46% / 48%, including leaners (+1, nc)
McCain: 43% / 45%, including leaners (+1, -1)