Me? I've met and lived among strongly religious to barely religious people (Hindus, Muslims, Christians). The more religious, the more closely bound the families are, even cousins, second cousins get together.
1) Your data will most likely be invariably limited in scope if it is gained merely from observations of your.. friends?
2) Other factors would need to be examined: Work demands, locality of family members, income etc etc.
Poorer nations/people do tend to have closer families for several obvious reasons - It would be a hard task to try and put this down to their religion, (other than to show that poorer people tend to be more religious which could inaccurately lead to the conclusion that religious people are more family orientated because of their religion).
But then it's unlikely you'd be interested in any actual studies or data that might give you less excuse to hate atheists - which is clearly your only agenda.