Parents are very attached to children in the Philippines, but there is also a responsibility kids have to their parents that is not implicit in American culture. Kids take care of parents and siblings, often sending them to college. It's not unusual for kids to sit out a few years while they work and help send brothers and sisters to college. By taking turns like this, it is not unusual to see kids still at home in their 20s, and dependent on the family. This may be part of what you're seeing with your daughter's boyfriend's family.
However, that being said, there is no such thing as a "generic" Filipino, just like there is no generic American. People are all individuals, and families are individual. My wife is very tough on our kids and has high expectations of them. In response to strict discipline, they are both very high achievers. That is something you tend to see with Filipinos; we know several other families like that. However, she has another Filipino friend who is just the opposite. Her kids walk all over her, get lackluster grades in school, and she's even afraid of them. So it is counter productive and even dangerous to assume that "all people" of [ethnicity-x] are like this or that. People are different in every culture.
Like Abraham Lincoln once said, "You can't believe everything you read on the Internet."