The fat ex copper who i did my advanced training with was also an ex racer who had lapped the Isle of Man at 110+ on an FZR1000 and his attitude was LETS MAKE PROGRESS...SAFELY. his idea of progress was very rapid as well.
The examiner on the IAM course i did is a serving officer who makes sure u do it by the book for the test, but said afterwards he personally when at work will give the benefit of the doubt to someone speeding but ridng well, but will go to town if your riding is not so quick but obviously careless and unsafe.
PS i don't wear a sam brown belt either and having despatched since 1980 have covered enough miles at speed to have to had the pleasure of several road side chats with the law, and got away with a fair few.
I have covered well in excess on half a million miles on bikes but didn't bother my IAM until a few years ago. It was well worth it, as there's always something new to learn no matter what you've done.Wish i had done it earlier.
Also done CSS level1 and a few track days but the 2 r completely different and fun in their own ways. Advanced training doesn't have to be boring if u get the right instruction.