OK, I just did my first cup in one of these.
I did not know (if I'd read this thread, would I have?) that the flow was so fast once you released it.
It stands to reason, though -- there's no duration of flow (as with the two or three pours in a regular dripper) for fines to clog the filter and slow things down.
I'm half wondering if we should use these at the market, instead of the Harios. Will experiment this weekend and see what customers think.
I wonder if I could step up the pace with a finder grind and still get a fast flow at drop time?