From the stats guy at ColtFreaks.com speaking of Brandt
"I will not bore you with the spreadsheets but I looked at his last six years and analyzed the top 100 prospects. I noted where he said they ranked and where they ended up being drafted. Long story short:-- Brandt is accurate in picking a players draft slot within 10 slots either way 75% of the time.
That means that if he ranks a guy as the #25 ranked guys, that 3 out of 4 times, that guy will be selected between 16 and 34. This is pretty easy to do at the top of the draft but get progressively harder when down in the 30s and 40s much less the 70s and 80s; however, Brandt still does a good job done there.That 75% number accounts for a lot of factors, most notably player injury and QB jumping, that lower that percentage. I thought that was a pretty accurate percentage over six draft classes."