There is a 7 year age gap between me and my brother. We have never been close and i haven't spoke to my brother in 6 years thanks to his now wife.
DH has about the same between his brother and 11 years between his sister. They are not close at all even when we lived in the UK.

I guess that's why i also wanted my kids so close.
What upsets me the most is when a family member says it. Paul's gran did to his cousin the other day and she had to tell her a few things she didn't know but with his nan a lot of it is old age.