That has been a common misconception. We did a bunch of weights two years ago and posted them here. Even back then Flow was right in there or lighter than the other major high end brands. Those results:
Here are some actual weights measured on our shipping scale. For each this was a single Size Large binding with disk and all mounting hardware:
Flow NXT-FSE = 2 lbs 4.8 oz
Flow Quattro SE = 2 lbs 2.37 oz
Flight 2 Men's = 2 lbs 3.1 oz
Rome 390 = 2 lbs 2.32 oz
Union Force = 2 lbs 2.44 oz
For my new park board (Salomon Drift Rocker) I went for a simple and light binding: Salomon Rhythm. It felt lightest of all in the store, but I can't find any weight info on the net to compare against above. Any input?
Since my home park is not that big it will be a lot of strap on/off - Flow advantage. But I want to keep it as light as possible - Flow disadvantage?
-- Better to have tried and failed and not tried at all --