> The fact that the vendors are acting so quickly about this suggests to me that they have other non-public examples of the problem

In this day and age, if a story is spreading from a small thread on a subreddit to a string of reactions here and there in quick succession, a maker can't just let it run without any statement, even if it was literally a single guy with an unrelated problem.

Getting out a "We're looking into it" statement as soon as possible is the least they can do to manage the PR situation in any sane way, whatever the actual scale of the problem is.