I would say the heart is RSN is starting to be based on an arrogance, the exact opposite of an inferiority complex. 2004 caused a 180 on the inferiority complex and 2007 was an exclamation point on that feeling.
the aspect of the Yankees/Red Sox rivalry that the media absolutely eats up now is the fact that since 2004, this rivalry has been completely switched around. Whereas Babe Ruth, Bucky Dent, Aaron Boone, etc. took on a mythological meaning within the media prior to 2004, stuff like a bloody sock, a David Ortiz jersey buried under the new stadium and the "Curse of A-Rod" are quickly gaining steam as having mythological meaning in the rivalry as it is now.