In theory yes, but there are plenty of cables that outright lie about their specs and there are probably plenty of people buying the wrong specs and then compla

In theory yes, but there are plenty of cables that outright lie about their specs and there are probably plenty of people buying the wrong specs and then complaining about slowness. For example, the iPhone update anecdote could be caused by USB-C 2.0 vs. 3.0 (3.0 supports faster data transfer).