I flew full Y EFD-IAH-LAX and back and received 2 points per segment (8 total) as well as EFD-IAH-CLL (College Station) on a V fare that showed Y for the EFD-IAH segments. I received 2 points for the EFD-IAH and 1 for the IAH-CLL for a total of 6 points.
It is definately worth looking for the Y fare. Sometimes you can snag it on the EFD-IAH by booking a fully refundable for the rest of your itinerary.
FWIW
DLM
[This message has been edited by dmunz (edited Mar 01, 2004).]