Okay, so we learned here that orchestras tune to A, and that one reason they do that is because A is an open string on your typical orchestral string instruments. We also learned here that wind bands prefer to tune to Bb because Bb is a no-valves-down note for valved brass / first position for trombones.
The natural follow-up question: do woodwind instruments also have a "preferred" tuning note? (Not that there is necessarily a single note that works for all woodwinds, but if you look at, say, a C flute, would that particular instrument have a "preferred" tuning note?)
As a (lousy) player of the Bb clarinet, I know there are certainly some notes that are bad for tuning, e.g. written Ab5, A5, and Bb5 (at the top of the lower register), but I'm not sure whether there are any particularly good notes. I guess there isn't really an equivalent to an "open string" on a woodwind instrument - if you open all the holes and keys on a woodwind instrument, you'll probably get some kind of bizarre non-note.