Here is another quote from Richard Lindzen, originator of the consensus QBO model. This is on picking out tidal periods from the data:
[PLANETARY WAVES ON BETA-PLANES](http://eaps.mit.edu/faculty/lindzen/18_bet~1.pdf) , 1967
The lunar nodal tidal period matches the QBO period exactly when seasonally aliased. If Lindzen believed what he wrote, he would have to say that the nature of the QBO forcing is now clear.