I vote no.
I feel that while it will help "seed" the site, it will do so artificially. There will be many duplicate answers. It would be a complex process to meticulously move them since there is no build in method to do so.
As these questions have already "settled" on other sites there would also be an issue with what happens if someone wants to add to it. They aren't in this private beta for Apple.SE, so they would be unable to add it here.
By taking these questions and confining them to our admittedly small group we would be hurting anyone else who may end up either contributing or needing help that would have been given by the question.
Consider what happens if we do decide to do this. Should people not as on SU because there is an Apple.SE? How would they contribute here?
SU (because it's most applicable for moving questions from) is the "parent" computer hardware / software site. Apple.SE is specifically Apple. That doesn't mean that SU is the wrong place to ask a question that happens to concern Apple hardware or software.