Wayne is saying that LPIT is one of his finest moments as a solo artist, he is not saying it was a great preformance. It isn't a great preformance, none of his live preformances are too great it was just a great moment in time. Plus, John never injected himself with heroin, he snorted it. He says he never injected it in an interview in 1970(the same one when he bashes Paul and talks about the breakup. I believe the rolling stones interview)