A Question for Mitt Romney

Recently on the Jay Leno Show, Mitt Romney said that people with pre existing conditions should not be able to get insurance coverage if they have not been consistently covered.  But that if they have had coverage consistently through other carriers, they should not be denied coverage.  Jay did a good job of following up on that statement, but no one asked this question.  If the Affordable Care Act allows a child to remain on their parent's insurance until the age of 26 and then required them to have coverage going forward through the individual mandate, wouldn't this solve the problem of a person not being insured until they were sick?  Wouldn't this mean that a person should conceivably be covered for their whole life?   Wouldn't that solve Mitt's 'hypothetical problem'?  But I guess that's a 'gotchya' question so it can't be asked to Mitt directly.