I'm not offended and you might be right to think that, but I've never came across someone who on a blind test can know the difference between lossless and a good mp3, that's it. Not a single one. Lot of talks but nobody did that. Ever. Prove me wrong and then I will be happy to look silly and I will continue my journey until I get there too.
I'm 26, 10 years into hifi, my hearing is regularly checked and it's perfect, I have (and had) tons of hifi equipment, and everybody saying that he can hear a difference, is basically lying. That because I do (on specific songs or songs part), and the difference is so tiny is laughable. Also I'm sure actually nobody can't do this test, and I have never seen someone doing so. Me neither of course. So everytime I see this kind of post I just make a laugh about it.
But he says that even in USB them sounds worse than bluetooth. And USB still uses the DSP. So this might not be the case.