@Jim
The backlog is with Google (WikiTree has a lot of pages, and Google decides how quickly to index those pages based on a lot of things such as how many other pages link to WikiTree, how many errors it runs into, how fast the pages load, etc), so any of the specialized WikiTree searches that use Google will be a bit out of date.
The person search and the new help page search use our own search server, so those are usually indexed within minutes. We do plan on building other searches similar to the Help page search, but I don't have an estimate for when those will be worked on.