Facts are hard to come by
, but I wouldn't agree with that impression. I don't know what would be so hard about migrating parts of "new" into LUWS.
I think having a new and a old in production at the same time is just going to confuse the members.
Well, I can certainly see why it would be a huge technical challenge to integrate the new into LUWS -- the whole security model is completely different for the two sites.
But in any case, I wasn't just making up my statement. I participate in a mailing list in which a senior technical writer for the Church participates; he has direct access to the developers of the new Calendar application. And he said that the old website would probably be operational through the end of 2011, and that the LUWS would not be phased out until all its elements have been developed for the new site.
I know that's just hearsay to you at this point, but I'll take that statement over speculation any day.
Questions that can benefit the larger community should be asked in a public forum, not a private message.