I sometimes do a search back in time for all the tweets from Portland,
Oregon. What I've found is that there seems to be a limit on the total
number of tweets I can get that is independent of time. The last time
I ran this, IIRC it returned about 30000 tweets. So I suspect the
answer is "30000 tweets or as far back as the index exists, whichever
is smaller."
--
M. Edward (Ed) Borasky
http://borasky-research.net http://twitter.com/znmeb
"A mathematician is a device for turning coffee into theorems." - Paul Erdos