The superfree concept has been replaced with speed foods. If you have the older books, I think anything with the S or SS symbols are still speed foods, but the others (e.g. bananas, pineapple) are now only free. Healthy Extras will only have had small tweaks at most.
Yeah, the plan worked then so there's no reason it won't work now - our genetics haven't drastically changed in three years! It's more just SW keeping up with (some of) the latest nutrition guidelines, so the sweeter fruits are no longer classed as superfree due to the sugar content.