Are all asynchronous USB inputs similar?

John Mingo of Baetis Audio makes a compelling case against USB use if the best sound quality is the objective. He expresses his perspective in the February TAS review of his digital music server. There are two sides of this debate, it seems he just listened and made a choice. I know of no better way to decide.
Charles,

Here is a better way to decide: customer posts on various forums:

http://www.empiricalaudio.com/news-and-reviews/off-ramp-converter

Steve N.
Empirical Audio

A better way to decide than to listen for yourself? Now, I have 'heard' everything!

Steve,
For someone to compare very well regarded USB products such as yours and the Baetis server,surely listening to both is the best way to make a choice.
Charles,

Certainly listening is the best way. I offer 30-day money-back, less shipping, so the risk is minimal.

I was just commenting that one vendors review is not as good as many customer unbiased posts.

Steve N.
Empirical Audio