it's a big assumption to make that paul blew his talent ,in any shape or form.in a nutshell i'd say it was a silly thing to say altogether.if anybody here can name me one single serious music act with a large body of work(4,5,6 albums,say)who has consistently put out work that each time/album has been as strong or stronger than their last album with NO filler at all then i will hold my hands up and say that macca definitely blew his talent.you can take elvis,the kinks,the stones,led zep,the who,anyone you like.the very nature of songwriting itself is that you do actually shoot wide of the mark from time to time,and you produce something you think is good,but your public think is not so good.this is what happened with paul......and john.........and george............i could go on........and on............and on............even the beatles did it with 'for sale' and 'let it be'.