hmmm. it seems this idea is not new at all. interesting read can be found here:
http://www.serenadawn.com/Alien-TheCollectedEssays.htmsimilar to the anchorpoint essays, really bound up in intense technical jargon, but it seems this line of thinking/theories on alien reproduction might indeed be where this idea came from. It also might contradict the way in which its being done in the film, i will have to read further and try to make sense of it all.
edit:
apparently its based on one unknown source, one of the comics and the anchorpoint essay, (its the old link however which doesn't work), all can be regarded as speculative and for the most part non-canon, however, i was not aware of any speculation involving the queen and any other reproductive cycles or development. This may mean the strausses may not have pulled the idea out of their asses but it still doesn't make it canon.
I'm not sure i fully understand the "spore theory" that well in some regards due to the technical jargon, mentioned earlier, but it does seem to imply that the queen can do something else if her egg sac becomes damaged. That is a little different from saying a young queen vomits something, but maybe the "yolk" they are talking about is what is vomits into people in avp-r. However, because of the contradictions to the behavior of the alien in the first and third films, even if properly explained and argued in somewhat of a non-arbitrary matter, it still seems like a non-canon idea to me.
here may be the best argument for a queen reproducing in any way other than egg sac. I hope it is not used against me later in the thread. lol. so don't even try. Also, i don't think the vomit is the intention, this could be the attempt to make sense of the egg morphing however. but anyway:
" Finally, it might be that prior to metamorphosis into a queen, each imago implants a host with a spore in this manner. It is likely that the queen becomes immobile once her egg production organs mature, and it would be difficult for her to obtain sufficient nutrients and hosts to establish a nest were she alone. If the imago prepared a second host in addition to the one it had implanted with a spore, the new queen would be assured of having at least one adult who could function in obtaining nutrients for the generation of her eggs and hosts for larval implantation. "
another edit. okay that is definitely a way of trying to explain the egg morphing. What it means by preparing two hosts is simply this: one with the spore that turns them into the egg, and the other to be used as a host for the facehugger, hence dallas and brett. This does seem to argue for the molting however, but upon reading no such vomiting ability is actually present. The molting can still be regarded as fan speculation, nothing more and we are right back where we started from, minus some info on how egg morphing might make a little more sense than previously thought.