Yes, and remember that data is commonly widely shared. Because, its mostly about long dead people?

The real breach is for recently deceased people (here the time span varies greatly, but dead for ~100 years is definitely enough if you ask me) and for living people. Actually in Sweden the death info is publically available generally right away, more or less. You can buy USB sticks with ~all deaths up until very recently.

ah, good point, I misread the bit “percentage of DNS shared with relatives”, I really thought one could share only Chromosome 3 with relatives for example (which does not make sense, granted), and that it was the bit which was stolen. Thanks for pointing this out.