Serenade,
I am satisfied with the english standard of the teachers at my kids' PCF kindergarten. As I said, there are many PCF centres out there, every one is different.
My boy used to attend Zoophonics, considered a "premium" school, charging high fees, but I was very unhappy with his teacher.
As for kids who like to go to many enrichment classes, I think it's because they just want a chance to go outside and stay away from their mommies
These kids probably don't have much chance to go out other than going to their enrichment classes.
I think if the parents are able to teach the child at home, then it is not necessary to send to enrichment class. But like my girl, she learns better in a classroom environment, compared to being taught at home by me, so it is better to send her to class. My boy only day dream in class, so I think it is better to teach him at home. But most FTWM will not have the time to teach their kids at home.
I think your friend with 2 GEP kids must have kids who are born very smart. Such kids certainly don't need any classes at all. Like my brother, my parents don't know a word of english, and can only afford to send him to PAP kindergarten. He went on to become the top singapore student in the university of cambridge in the year he graduated.
But for the majority of other average kids, a little help, whether it is from parents or enrichment class, will be necessary.