I've read a little of Adorno, it's particularly slow work though. I had a look at (the poet) Rilke's elegies, which Wikipedia added the following to [from Adorno's book The Jargon of Authenticity]
The fact that the neoromantic lyric sometimes behaves like the jargon [of authenticity], or at least timidly readies the way for it, should not lead us to look for the evil of the poetry simply in its form. It is not simply grounded, as a much too innocent view might maintain, in the mixture of poetry and prose. The evil, in the neoromantic lyric, consists in the fitting out of the words with a theological overtone, which is belied by the condition of the lonely and secular subject who is speaking there: religion as ornament
It seems like a bold move, to damn Rilke by association (with "authenticity").
My question is whether Adorno would, or rather did, retain anything of Heidegger's idea of authenticity (and what)?