I played before the national training centre was in existence. Nova Scotia was the best Atlantic Province in soccer before the NTC.
Why?
Generally the best talent in Canada is found in the biggest cities. The biggest city in Atlantic Canada is Halifax. The vast majority of Provincial team roster's players were from Halifax. That's where the competition was highest for players. Probably a combination of diversity, facilities, competition,high level training and numbers. Hard to attend the Provincial team practices in Halifax If you live in Cape Breton 5 hours away.
When we'd go to nationals and inevitably place 5-7th our coach theorized the reason was lack of high quality competition at home. You don't stay sharp and improve playing against 2 good teams and 5 garbage teams in the NSSL every year. New Brunswick and PEI tournaments didn't help either, as they were always a lower level of competition. It's the same idea for pro youth academies: Train hard and find the best competition to challenge yourself.
Stephen Hart trained my u13 club team for 2-3 months as a supplemental regional training centre when I was a kid. I don't think kids in rural N.S got those opportunities.