Do you want me to make a list of the thousands of UDFA's that didn't make over the last several years? 95% is being generous.
Now think about that now. 95% is 1/20. So if you only signed 10 players and 1 made the cut that would be 90%. Almost every team has 1 or 2 players that make the cut. We still have quite a few of the 19 UDFA we signed last year (4 although they did spend a majority of the season on the PS but they are still here a year later).
UDFA are where good FO can really make a franchise. Anyone can spot talent in the 1st few rounds, it takes a real eye for talent to pick up a Antonio Gates, Bart Scott, or Tony Romo as UDFA