wedivebc:That fact is based on when I am teaching deco procedures and advanced nitrox I invariably find a blank look on many PADI trained divers face when I mention things like Dalton's Law and EAD. They have to play catch-up to things that other agencies teach their divers during a nitrox course. I teach through TDI, PADI SDI and ANDI and I took my basic nitrox from IANTD so my opinoin is based on that limited experience
I remember in my PADI nitrox class going over Dalton's Law and EAD. Maybe it's not a PADI thing but more of the instructor that taught them the class.
I good guide line is to find a good instructor, no matter what agency and take your classes with them. Ask lots of questions.
Another tip is to avoid instructors that slam certifying agency.
CB