Lord Khram,
PADI standards are pretty good I think but it's individuals who bend the rules and certify divers who shouldn't have been certified (yet). Unfortunately do Dive Shop owners also often contribute to the problem and "force" their Instructors to start and finish a course in minimal time.
Every training agency has good and not so good Instructors (including BSAC, NAUI, CMAS, SSI etc.) but because PADI is the biggest training agency in the world and has most Instructors it also carries the burden of having a fair amount of not so good Instructors.
I have to agree with Bowmouth..
There may be concerns that the staff at a PADI facility may have about an individual to have them do a review/checkout before being allowed to dive with them.I doubt it was just because of a different agency certification.Maybe the example of a diver with a different agency and 200 dives was asked to do refresher because he may have had 200 dives but has not been in the water for several years or appeared to be physically unfit.
Years ago as a very young (24 YO) NASDS instructor I had a group in Bermuda. On a shore night dive a couple of local Brits wanted to dive with us.They were certified BSAC of course..I had to tow one in because of his exhaustion and out of air-I still had 2,000 psi and the other went back in with whom he was teamed with.I went back in after dropping him off at the beach and had a easy relaxing dive.Did I think his agency was at fault? NO way..it was the diver himself.You ONLY get out of a course/activity what you put IN..Diving is a commitment in Time (go diving often)and MONEY(gear ownership especially)..if you cannot do both do not expect to get very good at it.