It is known that the Kamenetzky mishpacha minhag is to eat gebrokts although R’ Yaakov did not. To avoid eating in someone’s house he told them he didn’t eat gebrokts. Since R’ Yaakov was makpid on Midvar Sheker Tirchak he never ate gebrokts after that.
mik5: There is also a minhag not to eat before Tekias Shofar. Also, my kos is in accord with the Chazon Ish and I drink the full cup.