It is impossible to trust either your results or the results of the review (the author simply does not have fast cards) for a simple reason - Lenovo does not indicate in the specifications the maximum possible read/write speeds of their readers. In the next instance, you may receive a random reader, which may differ significantly in performance. As is the quality of other components. This is the modern world of mass production, where the maximum possible number of characteristics of a product are hidden in order to reduce legal consequences in case of lawsuits. You can manipulate the components as the manufacturer pleases. Unfortunately, most consumers are naive (or, to put it another way, poorly educated, small-minded) and do not pay attention to these important nuances when choosing and purchasing a product.