They cite multiple primary peer-reviewed journal sources in the text that I'm not going to bother listing here.
These sources cited say that the best tasting beer is made with O2 injection?
The point that some are missing is that pure oxygen is not necessary to make beer, but it is necessary to make the best beer possible. A 1.090 doppelbock made with the shake and pray method may ferment out, but it will be inferior to one in which the proper O2 levels were obtained at the time of pitching by injecting pure oxygen to levels of 10-14ppm.
And by best beer possible I'm assuming you mean best taste?
Explain to me how on earth, in the absence of exhaustive blind taste testing and summation of those test results does one quantify this?
Taste, like sound, is subjective. It's like saying, "You can make good sounds with a Fender Twin Reverb but if you want to make the best sounds possible, you've got to use a Marshall Superlead."
The science is sound and the logic is simple. High gravity ale worts and all lagers require a high pitch rate and need high levels of oxygen to produce an adequate amount of sterols for healthy replication. Those levels have been determined by experiment to be > 8ppm, which can never be obtained by air alone due to the limited amount of oxygen present in air by nature.
I grasp the science and understand your logic but how does this translate into taste?
I hate to beat a dead horse, as this topic and all the threads relating to it eventually end up in the same stalemate, but I've normally seen it go something like this:
OP states that he does it like this. Asks for advice. People come on and say, "Hey man, works great for me and I don't see why it wouldn't for you." Great news right? Then, invariably, someone gets on and says, "You know, that's ok if you just want to make good beer, but if you want to make great beer......"
You can cite all the brewing books in the world, and unless one says in black and white that a certain method makes better tasting beer, you'd be hard pressed to convince me that one method works wonders over another.
To the OP: if your method works for you, keep Rockin' and Rollin'. Sorry to have derailed the thread.