I always tell my students that teachers make mistakes, too! Also, no ONE person knows it all. Even Ketch at Auto Int. states that he is always learning. I don't think any detail training facitilty will say, "We know IT all." If they did, that would deter me from attending. Education is lifelong and technology is always changing. Gary K. is liked and respected by many. I know that you stated, "Sorry if this may come out too strong," as a disclaimer of sorts, but I don't think it demonstates anything but professionalism on Gary's part. The top educators in the country are always consulting one another and Gary took his thread to the professional discussion board. Thus, professionals should be here to offer support and advice when needed.
I seem to be more direct in my old 37 yrs. of age. Just couldn't let that go with a little about how I felt about the comment.
Happy Detailing,
Rob Regan