The TAS review is the opinion of just ONE person, and is no more credible than anyone ONE else who also listens to the DAC8. Not everyone likes the same thing. That's why when you go to the ice cream shop, they offer more than just vanilla. The thing to understand is if anyone auditions any piece of audio gear and likes it, it is good regardless of the opnion of a reviewer.
As an example, perhaps a dozen years ago, maybe more, I had the chance to listen to a very costly tubed Pre-amp that had gotten glowing reviews- TAS, Stereophile, et al. I listened to the Pre amp and for the life of me didn't understand why, despite it's 5 figure price, it was considered awesome. I found it noisy, somewhat phasey, and ridiculously expensive. But mine was my opinion and I am sure many found the Pre amp to be extraordinary. I strongly preferred a Pre amp made by the same company that was far less expensive