ahron, The problem of OTD kids exists in both communities, unfortunately- some of the reasons are the same, some unique to each place.
While making aliya as a single or newly married couple has its difficulties, raising Israeli-born children is easier than having to uproot kids of various ages, so that they have to get to used to a new culture, learn in a new language, make new friends, etc. For those who want to make aliya with kids, it has to be a careful decision for each individual family, made with daas torah and input from educators. Many say not to go if kids are older than 10, or if kids have learning disabilities that will make picking up fluent Hebrew and learning in a second language very difficult.
LB, if the person asks your advice, feel free to give your bracha and encouragement!