The JOC is designed to help you make the transition from piston to jet.
Absolutely
You learn to control speed with the throttle, and glideslope with pitch -i.e. the opposite to how you fly a piston.
That technique is universal for instrument approaches regardless of type of aircraft and isn't really something one needs to pay money for to learn. In many ways it is what an untrained pilot would naturally assume.[/quote]
Also the pitch/power couple is something which needs some getting used to
I suspect that is a type specific issue.
as is getting used to speed control in general.
Yes, sort of, it is really the broader problem of energy management. Speed control per se is not really much different to any thing else. Flying an attitude is a basic IR skill. Ironically, constant descent approaches are the norm and where the majority of management difficulties lie, this wasn't ever dealt with until line training. Go figure
Personally I think the crucial differences between something like a 737 and Seneca is handling engine failures, descent planning (energy management) and two crew. In comparison to a well thought out jet based MCC course, a JOC is just waste of good money.