intergenerational transfer

Today's discussion about intergenerational language transfer was really interesting to me. The point was brought up that younger children generally speak less of the home language than their older siblings. I do not disagree or intend to refute this point, but it made me think of an interesting anecdote that I read recently. As part of another class I am going through several transcribed interviews from the famous NMCOSS project, and I came across someone who had two grandsons. This informant claimed that the reverse situation appeared to be happening in his or her family; the YOUNGER of the two boys was more fluent in Spanish than his older brother. This observation intrigued me, and especially after today's class.