"Well Met" - What! It's combat?

[tripleblessed]

As tripleblessed implies, "well met" is just a usage that has become obsolete in the UK although, even in Shakespeare's day, it would not have been used with somebody one had not previously met. Its sense would have been "I'm glad I bumped into you because..." (Or the reverse - "Ill met by moonlight, Titania" from "Midsummer Night's Dream"!)
The "Fall" is another US usage strange to our ears but was normal in the UK 400 years ago. Likewise the very archaic (except in Scots) "gotten" and so on.
Alan

Alan, as you note, this usage is normally for folk you know and are happy to see: "Well met, you got my sixty bucks?
I just had a flat." But I've also heard it serve to greet strangers: "Well met, kind of you to stop, as my spare's also flat,
and it's six miles to town. Now if my cousin might be in town so as to get my sixty bucks and a ride back out here with
something to get me down the road........"