Hi Bryan
As you can see on our website, the database is updated in realtime.
Could you provide us with the search you are doing?
NOTE:
The /search endpoint of our API currently only supports geotagged pictures, so you might have more recent non-geotagged pictures available on twitter.
The new version of the API we're working on will include all pictures coming from twitter (non-geotagged as well). Stay tuned for an announcement on this mailing list.
Hope it helps?
Best,