My daily labors in the blogosphere since 2004, impressive as they are to some, have garnered nary a word of encouragement, or the opposite, from any relative. In compensation, I have a big fat file folder of tributes from strangers.
I suspect this is not unusual. The people we know we take for granted. Is it not written that "no prophet is welcome in his hometown"? (Luke 4: 24: nemo propheta acceptus est in patria sua. Cf. John 1:46.)
One could call it the injustice of propinquity. We often underestimate those nearby, whether by blood or space, while overestimating those afar.