iBook Logic Board failure statistics?


Anyone have any information on what percentage of "logic board repair program" eligible iBooks failed, grouped by iBook model? I'm curious which iBooks fail the most and how long it generally takes them to fail. I'd guess if the program only lasts 3 years from when an eligible iBook was purchased, most failures must be taking place before the 3 years are up.

Did Apple ever say potentially every iBook eligible is susceptible to the failure or that perhaps iBooks which are lemon's would be problematic?

If anyone knows a website with more info on this, post it.