Tkitna, notice what you yourself posted, you say McCartney ALWAYS has his guard up, ALWAYS been egotistical, ALWAYS been the media darling, ALWAYS wants to fit in.
So if a person has ALWAYS behaved a certain way, aren't they being themselves? Now if McCartney starts acting in a way that we haven't seen before then I'll say he's being phony, but from what I've noticed ever since the Beatles hit the scene until this very day, is Paul McCartney being Paul McCartney!
How on Earth is McCartney acting like he's 30 by singing his own songs, in that case Dylan, Elton John, Robert Plant, Springsteen, The Who, Aerosmith, The Rolling Stones, and every other artist that has any kind of lengthy career is acting that way, totally ridiculous!
Sorry, but the vast majority of people who have attended McCartneys shows this year, totally disagree with you about McCartney sounding like a 70 year old man singing his fantastic rockers! If anything people are amazed at how good he sounds on these songs! You should check out Youtube!
As for McCartney looking silly (someones always going to have something negative to say) but just ask all those who saw him perform this year if they think he looks silly. The reviews I've read say the complete opposite.