Okay... I've never heard of the automatic release over here in AUS. Also, we don't have hunters/jumpers here either. There is Showjumping, which I guess is like your jumpers, and Equitation, which might be a little like your hunters. It's basically a round of jumping where they judge you on a scoresheet similar to dressage, on position, approach, line, etc. Plus you have to do tasks, I.e. Trot to fence 1, 4 strides between 6a and 6b, so on and so forth. You get scored on the tasks as well.
The only release I know of is a crest release... Over here that's the name for any release you give over a jump, and it simply varies in style/difficulty of jump, horses ability, etc.
So I guess i'm asking when you guys talk about an 'automatic release', what is it? And what is the difference between an automatic and a crest release?