I have timed other cams but not a 336 but, still, I am going to be real surprised if BMW advanced the 336 six degrees and has been calling it three degrees all these years. One thing that is starting to sink in is something that many a tuner has warned me about cams. There are no industry standards! Trends but not standards.
I am just glad we have for the most part moved on past discovering specs with lift check points.