I got a one month old U2 Ultra yesterday (to use in developing a boring program for that model). First place it went was the shop built integrating sphere where it showed a surprising 161 lumens. My last U2 (about 3 years ago) registered 114 lumens in the same sphere. Maybe I got the best binned U2 that SF has ever made, maybe not, but 161L isn't bad, and it far exceeds the specs that SF puts out.
FWIW, every SF that's gone into my sphere has read at least as good as the published specs, often more.